diff --git a/src/main/java/com/acquirex/dto/AcquisitionDto.java b/src/main/java/com/acquirex/dto/AcquisitionDto.java
new file mode 100644
index 0000000..4cf27a8
--- /dev/null
+++ b/src/main/java/com/acquirex/dto/AcquisitionDto.java
@@ -0,0 +1,88 @@
+package com.acquirex.dto;
+
+import jakarta.validation.constraints.*;
+import java.math.BigDecimal;
+import java.time.LocalDateTime;
+
+/**
+ * 카드 매입 요청/응답 DTO
+ * Spring Boot 3: javax.validation → jakarta.validation
+ */
+public class AcquisitionDto {
+
+    // ========== Request DTO ==========
+    public static class Request {
+        @NotBlank(message = "카드번호는 필수입니다")
+        @Size(min = 13, max = 19, message = "카드번호 길이가 올바르지 않습니다")
+        private String cardNumber;
+
+        @NotBlank(message = "가맹점ID는 필수입니다")
+        private String merchantId;
+
+        @NotNull(message = "금액은 필수입니다")
+        @DecimalMin(value = "0.01", message = "금액은 0보다 커야 합니다")
+        @Digits(integer = 13, fraction = 2, message = "금액 형식이 올바르지 않습니다")
+        private BigDecimal amount;
+
+        @NotBlank(message = "통화는 필수입니다")
+        @Size(min = 3, max = 3, message = "통화 코드는 3자리입니다")
+        private String currency;
+
+        public String getCardNumber() { return cardNumber; }
+        public void setCardNumber(String cardNumber) { this.cardNumber = cardNumber; }
+        public String getMerchantId() { return merchantId; }
+        public void setMerchantId(String merchantId) { this.merchantId = merchantId; }
+        public BigDecimal getAmount() { return amount; }
+        public void setAmount(BigDecimal amount) { this.amount = amount; }
+        public String getCurrency() { return currency; }
+        public void setCurrency(String currency) { this.currency = currency; }
+    }
+
+    // ========== Response DTO ==========
+    public static class Response {
+        private Long id;
+        private String approvalCode;
+        private String status;
+        private String message;
+        private BigDecimal amount;
+        private String currency;
+        private LocalDateTime approvalTime;
+
+        public Response() {}
+
+        public static Response success(Long id, String approvalCode, BigDecimal amount, String currency) {
+            Response response = new Response();
+            response.setId(id);
+            response.setApprovalCode(approvalCode);
+            response.setStatus("APPROVED");
+            response.setMessage("매입 승인이 완료되었습니다");
+            response.setAmount(amount);
+            response.setCurrency(currency);
+            response.setApprovalTime(LocalDateTime.now());
+            return response;
+        }
+
+        public static Response rejected(Long id, String reason) {
+            Response response = new Response();
+            response.setId(id);
+            response.setStatus("REJECTED");
+            response.setMessage(reason);
+            return response;
+        }
+
+        public Long getId() { return id; }
+        public void setId(Long id) { this.id = id; }
+        public String getApprovalCode() { return approvalCode; }
+        public void setApprovalCode(String approvalCode) { this.approvalCode = approvalCode; }
+        public String getStatus() { return status; }
+        public void setStatus(String status) { this.status = status; }
+        public String getMessage() { return message; }
+        public void setMessage(String message) { this.message = message; }
+        public BigDecimal getAmount() { return amount; }
+        public void setAmount(BigDecimal amount) { this.amount = amount; }
+        public String getCurrency() { return currency; }
+        public void setCurrency(String currency) { this.currency = currency; }
+        public LocalDateTime getApprovalTime() { return approvalTime; }
+        public void setApprovalTime(LocalDateTime approvalTime) { this.approvalTime = approvalTime; }
+    }
+}
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