diff --git a/domain/src/main/java/nexters/payout/domain/portfolio/domain/Portfolio.java b/domain/src/main/java/nexters/payout/domain/portfolio/domain/Portfolio.java
new file mode 100644
index 00000000..bee73dad
--- /dev/null
+++ b/domain/src/main/java/nexters/payout/domain/portfolio/domain/Portfolio.java
@@ -0,0 +1,43 @@
+package nexters.payout.domain.portfolio.domain;
+
+import jakarta.persistence.CollectionTable;
+import jakarta.persistence.ElementCollection;
+import jakarta.persistence.Entity;
+import jakarta.persistence.JoinColumn;
+import lombok.Getter;
+import nexters.payout.domain.BaseEntity;
+
+import java.time.Instant;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.UUID;
+
+
+@Entity
+@Getter
+public class Portfolio extends BaseEntity {
+
+    @ElementCollection
+    @CollectionTable(name = "portfolio_stock", joinColumns = @JoinColumn(name = "portfolio_id"))
+    private List<PortfolioStock> stocks = new ArrayList<>();
+    private Instant expireAt;
+
+    public Portfolio() {
+        super(null);
+    }
+
+    public Portfolio(final UUID id, final Instant expireAt) {
+        super(id);
+        this.expireAt = expireAt;
+    }
+
+    public Portfolio(final Instant expireAt, List<PortfolioStock> stocks) {
+        super(null);
+        this.stocks = stocks;
+        this.expireAt = expireAt;
+    }
+
+    public boolean isExpired() {
+        return expireAt.isAfter(Instant.now());
+    }
+}
diff --git a/domain/src/main/java/nexters/payout/domain/portfolio/domain/PortfolioStock.java b/domain/src/main/java/nexters/payout/domain/portfolio/domain/PortfolioStock.java
new file mode 100644
index 00000000..3bcdf104
--- /dev/null
+++ b/domain/src/main/java/nexters/payout/domain/portfolio/domain/PortfolioStock.java
@@ -0,0 +1,32 @@
+package nexters.payout.domain.portfolio.domain;
+
+import jakarta.persistence.Embeddable;
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+import java.util.UUID;
+
+@Embeddable
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class PortfolioStock {
+
+    private UUID stockId;
+    private Integer shares;
+
+
+    public PortfolioStock(final UUID id, final UUID stockId, final Integer shares) {
+        this.stockId = stockId;
+        this.shares = shares;
+    }
+
+    private PortfolioStock(final UUID stockId, final Integer shares) {
+        this.stockId = stockId;
+        this.shares = shares;
+    }
+
+    public PortfolioStock create(final UUID portfolioId, final UUID stockId, final Integer shares) {
+        return new PortfolioStock(portfolioId, stockId, shares);
+    }
+}
diff --git a/domain/src/main/java/nexters/payout/domain/portfolio/domain/repository/PortfolioRepository.java b/domain/src/main/java/nexters/payout/domain/portfolio/domain/repository/PortfolioRepository.java
new file mode 100644
index 00000000..e6a697d7
--- /dev/null
+++ b/domain/src/main/java/nexters/payout/domain/portfolio/domain/repository/PortfolioRepository.java
@@ -0,0 +1,10 @@
+package nexters.payout.domain.portfolio.domain.repository;
+
+import nexters.payout.domain.portfolio.domain.Portfolio;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.UUID;
+
+public interface PortfolioRepository extends JpaRepository<Portfolio, UUID> {
+
+}
diff --git a/domain/src/main/resources/db/migration/V5__add_portfolio.sql b/domain/src/main/resources/db/migration/V5__add_portfolio.sql
new file mode 100644
index 00000000..40469046
--- /dev/null
+++ b/domain/src/main/resources/db/migration/V5__add_portfolio.sql
@@ -0,0 +1,16 @@
+create table portfolio
+(
+    id binary (16) not null
+        primary key,
+    expire_at        datetime(6),
+    created_at       datetime(6),
+    last_modified_at  datetime(6)
+) engine = innodb
+  default charset = utf8mb4;
+
+create table portfolio_stock (
+    portfolio_id binary(16) not null,
+    stock_id binary(16),
+    shares integer
+) engine=InnoDB
+  default charset = utf8mb4;
\ No newline at end of file
diff --git a/domain/src/test/java/nexters/payout/domain/stock/service/StockDividendAnalysisServiceTest.java b/domain/src/test/java/nexters/payout/domain/stock/service/StockDividendAnalysisServiceTest.java
index f6211a64..99fc987f 100644
--- a/domain/src/test/java/nexters/payout/domain/stock/service/StockDividendAnalysisServiceTest.java
+++ b/domain/src/test/java/nexters/payout/domain/stock/service/StockDividendAnalysisServiceTest.java
@@ -81,7 +81,7 @@ class StockDividendAnalysisServiceTest {
 
         Dividend pastDividend = DividendFixture.createDividendWithExDividendDate(
                 UUID.randomUUID(),
-                LocalDate.of(now.getYear(), now.getMonth().minus(1), now.getDayOfMonth())
+                LocalDate.of(now.getYear(), now.getMonth().minus(1), 1)
                         .atStartOfDay(ZoneId.systemDefault()).toInstant()
         );
 
diff --git a/domain/src/testFixtures/java/nexters/payout/domain/PortfolioFixture.java b/domain/src/testFixtures/java/nexters/payout/domain/PortfolioFixture.java
new file mode 100644
index 00000000..7404ca69
--- /dev/null
+++ b/domain/src/testFixtures/java/nexters/payout/domain/PortfolioFixture.java
@@ -0,0 +1,18 @@
+package nexters.payout.domain;
+
+import nexters.payout.domain.portfolio.domain.Portfolio;
+import nexters.payout.domain.portfolio.domain.PortfolioStock;
+
+import java.time.Instant;
+import java.util.UUID;
+
+public class PortfolioFixture {
+
+    public static Portfolio createPortfolio(Instant expireAt) {
+        return new Portfolio(UUID.randomUUID(), expireAt);
+    }
+
+    public static PortfolioStock createPortfolioStock(UUID portfolioId, UUID stockId, Integer shares) {
+        return new PortfolioStock(UUID.randomUUID(), stockId, shares);
+    }
+}