diff --git a/service/src/main/kotlin/com/sangdol/roomescape/payment/business/PaymentWriter.kt b/service/src/main/kotlin/com/sangdol/roomescape/payment/business/PaymentWriter.kt
index 06226ec4..bbeda832 100644
--- a/service/src/main/kotlin/com/sangdol/roomescape/payment/business/PaymentWriter.kt
+++ b/service/src/main/kotlin/com/sangdol/roomescape/payment/business/PaymentWriter.kt
@@ -10,7 +10,7 @@ import com.sangdol.roomescape.payment.infrastructure.persistence.*
 import io.github.oshai.kotlinlogging.KLogger
 import io.github.oshai.kotlinlogging.KotlinLogging
 import org.springframework.stereotype.Component
-import java.time.LocalDateTime
+import java.time.Instant
 
 private val log: KLogger = KotlinLogging.logger {}
 
@@ -60,7 +60,7 @@ class PaymentWriter(
     fun cancel(
         userId: Long,
         payment: PaymentEntity,
-        requestedAt: LocalDateTime,
+        requestedAt: Instant,
         cancelResponse: PaymentClientCancelResponse
     ): CanceledPaymentEntity {
         log.debug { "[PaymentWriterV2.cancelPayment] 결제 취소 정보 저장 시작: payment.id=${payment.id}" }
diff --git a/service/src/main/kotlin/com/sangdol/roomescape/payment/infrastructure/client/TosspayCancelDTO.kt b/service/src/main/kotlin/com/sangdol/roomescape/payment/infrastructure/client/TosspayCancelDTO.kt
index a4077b27..2ba4f6a1 100644
--- a/service/src/main/kotlin/com/sangdol/roomescape/payment/infrastructure/client/TosspayCancelDTO.kt
+++ b/service/src/main/kotlin/com/sangdol/roomescape/payment/infrastructure/client/TosspayCancelDTO.kt
@@ -6,7 +6,7 @@ import com.fasterxml.jackson.databind.JsonNode
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize
 import com.sangdol.roomescape.payment.infrastructure.common.PaymentStatus
 import com.sangdol.roomescape.payment.infrastructure.persistence.CanceledPaymentEntity
-import java.time.LocalDateTime
+import java.time.Instant
 import java.time.OffsetDateTime
 
 data class PaymentClientCancelResponse(
@@ -28,10 +28,10 @@ fun CancelDetail.toEntity(
     id: Long,
     paymentId: Long,
     canceledBy: Long,
-    cancelRequestedAt: LocalDateTime
+    cancelRequestedAt: Instant
 ) = CanceledPaymentEntity(
     id = id,
-    canceledAt = this.canceledAt,
+    canceledAt = this.canceledAt.toInstant(),
     requestedAt = cancelRequestedAt,
     paymentId = paymentId,
     canceledBy = canceledBy,
diff --git a/service/src/main/kotlin/com/sangdol/roomescape/payment/infrastructure/client/TosspayConfirmDTO.kt b/service/src/main/kotlin/com/sangdol/roomescape/payment/infrastructure/client/TosspayConfirmDTO.kt
index ebcf0719..ca8f549a 100644
--- a/service/src/main/kotlin/com/sangdol/roomescape/payment/infrastructure/client/TosspayConfirmDTO.kt
+++ b/service/src/main/kotlin/com/sangdol/roomescape/payment/infrastructure/client/TosspayConfirmDTO.kt
@@ -34,8 +34,8 @@ fun PaymentClientConfirmResponse.toEntity(
     paymentKey = this.paymentKey,
     orderId = orderId,
     totalAmount = this.totalAmount,
-    requestedAt = this.requestedAt,
-    approvedAt = this.approvedAt,
+    requestedAt = this.requestedAt.toInstant(),
+    approvedAt = this.approvedAt.toInstant(),
     type = paymentType,
     method = this.method,
     status = this.status,
diff --git a/service/src/main/kotlin/com/sangdol/roomescape/payment/infrastructure/persistence/CanceledPaymentEntity.kt b/service/src/main/kotlin/com/sangdol/roomescape/payment/infrastructure/persistence/CanceledPaymentEntity.kt
index 4db2e14d..d85a26ce 100644
--- a/service/src/main/kotlin/com/sangdol/roomescape/payment/infrastructure/persistence/CanceledPaymentEntity.kt
+++ b/service/src/main/kotlin/com/sangdol/roomescape/payment/infrastructure/persistence/CanceledPaymentEntity.kt
@@ -3,8 +3,7 @@ package com.sangdol.roomescape.payment.infrastructure.persistence
 import com.sangdol.common.persistence.PersistableBaseEntity
 import jakarta.persistence.Entity
 import jakarta.persistence.Table
-import java.time.LocalDateTime
-import java.time.OffsetDateTime
+import java.time.Instant
 
 @Entity
 @Table(name = "canceled_payment")
@@ -12,8 +11,8 @@ class CanceledPaymentEntity(
     id: Long,
 
     val paymentId: Long,
-    val requestedAt: LocalDateTime,
-    val canceledAt: OffsetDateTime,
+    val requestedAt: Instant,
+    val canceledAt: Instant,
     val canceledBy: Long,
     val cancelReason: String,
     val cancelAmount: Int,
diff --git a/service/src/main/kotlin/com/sangdol/roomescape/payment/infrastructure/persistence/PaymentEntity.kt b/service/src/main/kotlin/com/sangdol/roomescape/payment/infrastructure/persistence/PaymentEntity.kt
index 48aa5587..1571e15e 100644
--- a/service/src/main/kotlin/com/sangdol/roomescape/payment/infrastructure/persistence/PaymentEntity.kt
+++ b/service/src/main/kotlin/com/sangdol/roomescape/payment/infrastructure/persistence/PaymentEntity.kt
@@ -8,7 +8,7 @@ import jakarta.persistence.Entity
 import jakarta.persistence.EnumType
 import jakarta.persistence.Enumerated
 import jakarta.persistence.Table
-import java.time.OffsetDateTime
+import java.time.Instant
 
 @Entity
 @Table(name = "payment")
@@ -19,8 +19,8 @@ class PaymentEntity(
     val paymentKey: String,
     val orderId: String,
     val totalAmount: Int,
-    val requestedAt: OffsetDateTime,
-    val approvedAt: OffsetDateTime,
+    val requestedAt: Instant,
+    val approvedAt: Instant,
 
     @Enumerated(EnumType.STRING)
     val type: PaymentType,
diff --git a/service/src/main/kotlin/com/sangdol/roomescape/payment/web/PaymentDTO.kt b/service/src/main/kotlin/com/sangdol/roomescape/payment/web/PaymentDTO.kt
index 1e39f186..0ed997b0 100644
--- a/service/src/main/kotlin/com/sangdol/roomescape/payment/web/PaymentDTO.kt
+++ b/service/src/main/kotlin/com/sangdol/roomescape/payment/web/PaymentDTO.kt
@@ -6,8 +6,7 @@ import com.sangdol.roomescape.payment.infrastructure.common.PaymentStatus
 import com.sangdol.roomescape.payment.infrastructure.common.PaymentType
 import com.sangdol.roomescape.payment.infrastructure.persistence.*
 import com.sangdol.roomescape.payment.web.PaymentDetailResponse.*
-import java.time.LocalDateTime
-import java.time.OffsetDateTime
+import java.time.Instant
 
 data class PaymentConfirmRequest(
     val paymentKey: String,
@@ -24,7 +23,7 @@ data class PaymentCreateResponse(
 data class PaymentCancelRequest(
     val reservationId: Long,
     val cancelReason: String,
-    val requestedAt: LocalDateTime = LocalDateTime.now()
+    val requestedAt: Instant = Instant.now()
 )
 
 data class PaymentWithDetailResponse(
@@ -32,8 +31,8 @@ data class PaymentWithDetailResponse(
     val totalAmount: Int,
     val method: String,
     val status: PaymentStatus,
-    val requestedAt: OffsetDateTime,
-    val approvedAt: OffsetDateTime,
+    val requestedAt: Instant,
+    val approvedAt: Instant,
     val detail: PaymentDetailResponse?,
     val cancel: PaymentCancelDetailResponse?,
 )
@@ -120,8 +119,8 @@ fun PaymentEasypayPrepaidDetailEntity.toEasyPayPrepaidDetailResponse(): EasyPayP
 }
 
 data class PaymentCancelDetailResponse(
-    val cancellationRequestedAt: LocalDateTime,
-    val cancellationApprovedAt: OffsetDateTime?,
+    val cancellationRequestedAt: Instant,
+    val cancellationApprovedAt: Instant?,
     val cancelReason: String,
     val canceledBy: Long,
 )
diff --git a/service/src/test/kotlin/com/sangdol/roomescape/supports/DummyInitializer.kt b/service/src/test/kotlin/com/sangdol/roomescape/supports/DummyInitializer.kt
index f1252bc3..3e71288a 100644
--- a/service/src/test/kotlin/com/sangdol/roomescape/supports/DummyInitializer.kt
+++ b/service/src/test/kotlin/com/sangdol/roomescape/supports/DummyInitializer.kt
@@ -30,7 +30,7 @@ import com.sangdol.roomescape.theme.web.ThemeCreateRequest
 import com.sangdol.roomescape.theme.web.toEntity
 import com.sangdol.roomescape.user.infrastructure.persistence.UserEntity
 import org.springframework.data.repository.findByIdOrNull
-import java.time.LocalDateTime
+import java.time.Instant
 
 class DummyInitializer(
     private val storeRepository: StoreRepository,
@@ -206,7 +206,7 @@ class DummyInitializer(
         return paymentWriter.cancel(
             userId,
             payment,
-            requestedAt = LocalDateTime.now(),
+            requestedAt = Instant.now(),
             clientCancelResponse
         )
     }
diff --git a/service/src/test/kotlin/com/sangdol/roomescape/supports/Fixtures.kt b/service/src/test/kotlin/com/sangdol/roomescape/supports/Fixtures.kt
index 3833b24c..27ef1215 100644
--- a/service/src/test/kotlin/com/sangdol/roomescape/supports/Fixtures.kt
+++ b/service/src/test/kotlin/com/sangdol/roomescape/supports/Fixtures.kt
@@ -26,7 +26,6 @@ import com.sangdol.roomescape.user.web.MIN_PASSWORD_LENGTH
 import com.sangdol.roomescape.user.web.UserCreateRequest
 import java.time.LocalDate
 import java.time.LocalTime
-import java.time.OffsetDateTime
 
 const val INVALID_PK: Long = 9999L
 val IDGenerator = TsidIDGenerator(TsidFactory(0))