diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..8af972c
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,3 @@
+/gradlew text eol=lf
+*.bat text eol=crlf
+*.jar binary
diff --git a/.github/ISSUE_TEMPLATE/bug.yml b/.github/ISSUE_TEMPLATE/bug.yml
new file mode 100644
index 0000000..2e5d20f
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/bug.yml
@@ -0,0 +1,42 @@
+name: "🐛 Bug Report"
+description: 애플리케이션에서 발견한 버그를 신고합니다.
+labels: [ "bug" ]
+body:
+  - type: textarea
+    id: bug-description
+    attributes:
+      label: 버그 설명
+      description: 어떤 버그인지 간략하게 설명해주세요.
+      placeholder: 예) 로그인 시 오류가 발생합니다.
+    validations:
+      required: true
+
+  - type: textarea
+    id: steps-to-reproduce
+    attributes:
+      label: 재현 방법
+      description: 버그를 재현하는 단계를 상세히 작성해주세요.
+      placeholder: |
+        1. 홈페이지로 이동
+        2. 로그인 버튼 클릭
+        3. 오류 메시지 확인
+    validations:
+      required: true
+
+  - type: textarea
+    id: expected-result
+    attributes:
+      label: 예상 결과
+      description: 어떤 결과를 기대했는지 설명해주세요.
+      placeholder: 예) 사용자가 정상적으로 로그인되어 대시보드로 이동해야 합니다.
+    validations:
+      required: true
+
+  - type: textarea
+    id: actual-result
+    attributes:
+      label: 실제 결과
+      description: 실제로 발생한 결과를 설명해주세요.
+      placeholder: 예) 로그인 시 "서버 오류" 메시지가 표시됩니다.
+    validations:
+      required: true
diff --git a/.github/ISSUE_TEMPLATE/feature.yml b/.github/ISSUE_TEMPLATE/feature.yml
new file mode 100644
index 0000000..bd17dcd
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/feature.yml
@@ -0,0 +1,22 @@
+name: "✨ Feature"
+description: "새로운 기능 추가"
+labels: [ "feature" ]
+body:
+  - type: textarea
+    attributes:
+      label: 설명
+      description: 새로운 기능에 대한 설명을 작성해 주세요.
+      placeholder: 자세히 적을수록 좋습니다!
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: 작업할 내용
+      description: 할 일을 체크박스 형태로 작성해주세요.
+      placeholder: 최대한 세분화 해서 적어주세요!
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: 참고 자료
+      description: 참고 자료가 있다면 작성해 주세요.
diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
new file mode 100644
index 0000000..b85803e
--- /dev/null
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -0,0 +1,31 @@
+## 🔍 PR 타입 선택
+
+아래 타입 중 해당하는 하나를 선택해 주세요. 반드시 하나만 선택해 주세요.
+
+- [ ] `feat`: 새로운 기능 추가
+- [ ] `fix`: 버그 수정
+- [ ] `docs`: 문서 수정
+- [ ] `style`: 코드 포맷팅, 세미콜론 누락, 코드 변경이 없는 경우
+- [ ] `refactor`: 코드 리팩토링
+- [ ] `test`: 테스트 코드 추가 또는 수정
+- [ ] `chore`: 빌드 업무 수정, 패키지 매니저 수정 등 기타 작업
+
+
+## 📝 변경 사항 요약
+
+변경 사항을 간단히 요약해 주세요.
+
+- 예: 사용자 프로필 페이지 추가
+- 예: 로그인 버그 수정
+
+
+## 🛠 관련 이슈
+
+Resolves: #123  
+Ref: #456  
+Related to: #48, #45
+close: #번호
+
+### **추가 설명 (선택 사항)**
+
+변경 사항에 대한 추가 설명을 작성해 주세요.
diff --git a/.github/workflows/PR.yml b/.github/workflows/PR.yml
new file mode 100644
index 0000000..b606d50
--- /dev/null
+++ b/.github/workflows/PR.yml
@@ -0,0 +1,14 @@
+name: PR to Discord
+
+on:
+  pull_request:
+    branches: [ "develop" ]
+    types: [opened, reopened]
+
+jobs:
+  PR:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: Team-Retrip/PR-to-Discord@main
+        with:
+          discord_webhook_url: ${{ secrets.DISCORD_WEBHOOK_URL }}
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c2065bc
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,37 @@
+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
diff --git a/build.gradle b/build.gradle
new file mode 100644
index 0000000..5a08198
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,63 @@
+plugins {
+    id 'java'
+    id 'org.springframework.boot' version '4.0.0'
+    id 'io.spring.dependency-management' version '1.1.7'
+}
+
+group = 'com.retrip'
+version = '0.0.1-SNAPSHOT'
+description = 'deposit'
+
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(21)
+    }
+}
+
+configurations {
+    compileOnly {
+        extendsFrom annotationProcessor
+    }
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+    implementation 'org.springframework.boot:spring-boot-starter-validation'
+    implementation 'org.springframework.boot:spring-boot-starter-web'
+    implementation 'org.springframework.boot:spring-boot-starter-webflux'
+    implementation "org.springdoc:springdoc-openapi-starter-webmvc-api:2.8.5"
+    implementation "org.springdoc:springdoc-openapi-starter-webmvc-ui:2.8.5"
+
+
+    compileOnly 'org.projectlombok:lombok'
+    runtimeOnly 'com.h2database:h2'
+    annotationProcessor 'org.projectlombok:lombok'
+    testImplementation 'org.springframework.boot:spring-boot-starter-test'
+    testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+
+    implementation 'com.querydsl:querydsl-jpa:5.1.0:jakarta'
+    annotationProcessor 'com.querydsl:querydsl-apt:5.1.0:jakarta'
+    annotationProcessor 'jakarta.persistence:jakarta.persistence-api'
+}
+
+tasks.named('test') {
+    useJUnitPlatform()
+}
+
+sourceSets {
+    main.java.srcDirs += 'build/generated/source/apt/main'
+}
+
+tasks.withType(JavaCompile).configureEach {
+    options.annotationProcessorPath = configurations.annotationProcessor
+}
+
+tasks.named('clean') {
+    doLast {
+        delete fileTree('build/generated')
+    }
+}
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..f8e1ee3
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..23449a2
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.2.1-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
new file mode 100755
index 0000000..adff685
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,248 @@
+#!/bin/sh
+
+#
+# Copyright © 2015 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..c4bdd3a
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,93 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/settings.gradle b/settings.gradle
new file mode 100644
index 0000000..412f8e1
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = 'deposit'
diff --git a/src/main/java/com/retrip/deposit/DepositApplication.java b/src/main/java/com/retrip/deposit/DepositApplication.java
new file mode 100644
index 0000000..cd30b66
--- /dev/null
+++ b/src/main/java/com/retrip/deposit/DepositApplication.java
@@ -0,0 +1,13 @@
+package com.retrip.deposit;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class DepositApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(DepositApplication.class, args);
+    }
+
+}
diff --git a/src/main/java/com/retrip/deposit/domain/entity/Deposit.java b/src/main/java/com/retrip/deposit/domain/entity/Deposit.java
new file mode 100644
index 0000000..cb01f83
--- /dev/null
+++ b/src/main/java/com/retrip/deposit/domain/entity/Deposit.java
@@ -0,0 +1,60 @@
+package com.retrip.deposit.domain.entity;
+
+import com.retrip.deposit.domain.vo.DepositMembers;
+import jakarta.persistence.Column;
+import jakarta.persistence.Embedded;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+
+import java.util.List;
+
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+import java.time.LocalDateTime;
+import java.util.UUID;
+
+@Entity
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class Deposit {
+    @Id
+    @Column(columnDefinition = "varbinary(16)")
+    private UUID id;
+
+    private Long amount;
+    @Column(name = "payment_option", length = 50, nullable = false)
+    private PaymentOption paymentOption;
+    private LocalDateTime depositDate;
+    private LocalDateTime withdrawalDate;
+
+    @Embedded
+    private DepositMembers depositMembers;
+
+    private Deposit(Long amount, PaymentOption paymentOption, LocalDateTime depositDate, List<UUID> members) {
+        this.amount = amount;
+        this.paymentOption = paymentOption;
+        this.depositDate = depositDate;
+        this.depositMembers = new DepositMembers(this, members, amount / members.size());
+    }
+
+    //todo: 초기 MVP는 무조건 1/N 정산으로
+    public static Deposit create(Long amount, String paymentOption, LocalDateTime depositDate, List<UUID> members) {
+        return new Deposit(amount, PaymentOption.codeOf(paymentOption), depositDate, members);
+    }
+
+    public boolean isStartTravel() {
+        if (depositDate.isBefore(LocalDateTime.now())) {
+            return false; //정산 일자 이전
+        }
+        return this.depositMembers.isDepositPaid();
+    }
+
+    public String getRefundFeeMessage() {
+        if (depositDate != null && depositDate.plusMonths(1).isAfter(LocalDateTime.now())) {
+            return "입금일 기준 30일이 초과되어 보증금 3.5%를 돌려 받을수 없습니다.";
+        }
+        return null;
+    }
+}
diff --git a/src/main/java/com/retrip/deposit/domain/entity/DepositMember.java b/src/main/java/com/retrip/deposit/domain/entity/DepositMember.java
new file mode 100644
index 0000000..3d0d6a5
--- /dev/null
+++ b/src/main/java/com/retrip/deposit/domain/entity/DepositMember.java
@@ -0,0 +1,46 @@
+package com.retrip.deposit.domain.entity;
+
+import jakarta.persistence.*;
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+import java.util.UUID;
+
+@Entity
+@NoArgsConstructor(access = AccessLevel.PROTECTED, force = true)
+@Getter
+public class DepositMember {
+
+    @Id
+    @Column(columnDefinition = "varbinary(16)")
+    private UUID id;
+
+    @Column(nullable = false)
+    private UUID memberId;
+
+    private long amount;
+    private long totalAmount;
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(
+            name = "deposit_id",
+            nullable = false,
+            columnDefinition = "varbinary(16)",
+            foreignKey = @ForeignKey(name = "fk_deposit_member_to_deposit")
+    )
+    private Deposit deposit;
+
+
+    public DepositMember(Deposit deposit, UUID memberId, Long totalAmount) {
+        this.id = UUID.randomUUID();
+        this.deposit = deposit;
+        this.memberId = memberId;
+        this.totalAmount = totalAmount;
+        this.amount = 0L;
+    }
+
+    public boolean isDepositPaid() {
+        return amount == totalAmount;
+    }
+}
diff --git a/src/main/java/com/retrip/deposit/domain/entity/PaymentOption.java b/src/main/java/com/retrip/deposit/domain/entity/PaymentOption.java
new file mode 100644
index 0000000..bb1b2ce
--- /dev/null
+++ b/src/main/java/com/retrip/deposit/domain/entity/PaymentOption.java
@@ -0,0 +1,20 @@
+package com.retrip.deposit.domain.entity;
+
+import java.util.Arrays;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+@Getter
+@AllArgsConstructor
+public enum PaymentOption {
+    CARD("CARD");
+    private final String code;
+    public static PaymentOption codeOf(String code) {
+        return Arrays.stream(PaymentOption.values())
+                .filter(paymentOption -> paymentOption.getCode().equals(code))
+                .findAny()
+                .orElseThrow(() -> new IllegalArgumentException("존재하지 않는 코드입니다."));
+    }
+
+}
diff --git a/src/main/java/com/retrip/deposit/domain/entity/Settlement.java b/src/main/java/com/retrip/deposit/domain/entity/Settlement.java
new file mode 100644
index 0000000..081e33c
--- /dev/null
+++ b/src/main/java/com/retrip/deposit/domain/entity/Settlement.java
@@ -0,0 +1,20 @@
+package com.retrip.deposit.domain.entity;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+import java.util.UUID;
+
+@Entity
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class Settlement {
+    @Id
+    @Column(columnDefinition = "varbinary(16)")
+    private UUID id;
+
+}
diff --git a/src/main/java/com/retrip/deposit/domain/vo/DepositMembers.java b/src/main/java/com/retrip/deposit/domain/vo/DepositMembers.java
new file mode 100644
index 0000000..5eff78e
--- /dev/null
+++ b/src/main/java/com/retrip/deposit/domain/vo/DepositMembers.java
@@ -0,0 +1,33 @@
+package com.retrip.deposit.domain.vo;
+
+import com.retrip.deposit.domain.entity.Deposit;
+import com.retrip.deposit.domain.entity.DepositMember;
+
+import jakarta.persistence.CascadeType;
+import jakarta.persistence.Embeddable;
+import jakarta.persistence.OneToMany;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import java.util.UUID;
+
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED, force = true)
+@Embeddable
+public class DepositMembers {
+    @OneToMany(mappedBy = "deposit", cascade = CascadeType.ALL, orphanRemoval = true)
+    private List<DepositMember> values = new ArrayList<>();
+
+    public DepositMembers(Deposit deposit, List<UUID> members, long amount) { // 1/N 정산
+        values.addAll( members.stream().map(member -> new DepositMember(deposit, member,amount)).toList());
+    }
+
+    public boolean isDepositPaid() {
+        return values.stream().filter(dm -> dm.isDepositPaid()).count() == values.size();
+    }
+}
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
new file mode 100644
index 0000000..31262d5
--- /dev/null
+++ b/src/main/resources/application.properties
@@ -0,0 +1 @@
+spring.application.name=deposit
diff --git a/src/test/java/com/retrip/deposit/DepositApplicationTests.java b/src/test/java/com/retrip/deposit/DepositApplicationTests.java
new file mode 100644
index 0000000..3799efc
--- /dev/null
+++ b/src/test/java/com/retrip/deposit/DepositApplicationTests.java
@@ -0,0 +1,13 @@
+package com.retrip.deposit;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class DepositApplicationTests {
+
+    @Test
+    void contextLoads() {
+    }
+
+}
diff --git a/src/test/java/com/retrip/deposit/domain/entity/DepositTest.java b/src/test/java/com/retrip/deposit/domain/entity/DepositTest.java
new file mode 100644
index 0000000..02f132d
--- /dev/null
+++ b/src/test/java/com/retrip/deposit/domain/entity/DepositTest.java
@@ -0,0 +1,88 @@
+package com.retrip.deposit.domain.entity;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import java.time.LocalDateTime;
+import java.util.List;
+import java.util.UUID;
+
+class DepositTest {
+    @Test
+    @DisplayName("보증금 생성 테스트")
+    public void createDepositTest() {
+        //GiVEN
+
+
+        //WHEN
+        Deposit deposit = Deposit.create(200_000L, "CARD", LocalDateTime.now().plusDays(3), List.of(UUID.randomUUID(), UUID.randomUUID(), UUID.randomUUID()));
+
+        //THEN
+        Assertions.assertNotNull(deposit);
+        Assertions.assertNotNull(deposit.getDepositMembers());
+        Assertions.assertEquals(3, deposit.getDepositMembers().getValues().size());
+    }
+
+    @Test
+    @DisplayName("보증금 환불 안내 문구 테스트")
+    public void getRefundFeeMessageTest() {
+        //GiVEN
+        Deposit deposit = Deposit.create(200_000L, "CARD", LocalDateTime.now().minusMinutes(2), List.of(UUID.randomUUID(), UUID.randomUUID(), UUID.randomUUID()));
+
+
+        //WHEN
+        String message = deposit.getRefundFeeMessage();
+
+
+        //THEN
+        Assertions.assertEquals("입금일 기준 30일이 초과되어 보증금 3.5%를 돌려 받을수 없습니다.", message);
+    }
+
+    @Test
+    @DisplayName("보증금 일자 이전이라 여행 시작이 불가능")
+    public void canNotStartTravelByBeforeDepositDate() {
+        //GiVEN
+        Deposit deposit = Deposit.create(200_000L, "CARD", LocalDateTime.now().plusDays(1), List.of(UUID.randomUUID(), UUID.randomUUID(), UUID.randomUUID()));
+
+
+        //WHEN
+        boolean isStartTravel = deposit.isStartTravel();
+
+
+        //THEN
+        Assertions.assertFalse(isStartTravel);
+    }
+
+    @Test
+    @DisplayName("모두 보증금을 납부하지 않아서, 여행 시작 불가능")
+    public void canNotStartTravelByNotDepositPaid() {
+        //GiVEN
+        Deposit deposit = Deposit.create(200_000L, "CARD", LocalDateTime.now().minusDays(1), List.of(UUID.randomUUID(), UUID.randomUUID(), UUID.randomUUID()));
+
+
+        //WHEN
+        boolean isStartTravel = deposit.isStartTravel();
+
+
+        //THEN
+        Assertions.assertFalse(isStartTravel);
+    }
+
+    @Test
+    @DisplayName("보증금을 모두 납부해서, 여행 가능")
+    public void canStartTravel() {
+        //GiVEN
+        //보증금이 0원이라 모두 보증한 상태
+        Deposit deposit = Deposit.create(0L, "CARD", LocalDateTime.now().minusDays(1), List.of(UUID.randomUUID(), UUID.randomUUID(), UUID.randomUUID()));
+
+
+        //WHEN
+        boolean isStartTravel = deposit.isStartTravel();
+
+
+        //THEN
+        Assertions.assertFalse(isStartTravel);
+    }
+
+}