diff --git a/packages/better-auth/src/db/get-tables.test.ts b/packages/better-auth/src/db/get-tables.test.ts
new file mode 100644
index 0000000000..042439ea0e
--- /dev/null
+++ b/packages/better-auth/src/db/get-tables.test.ts
@@ -0,0 +1,60 @@
+import { describe, expect, it } from "vitest";
+import { getAuthTables } from "./get-tables";
+
+describe("getAuthTables", () => {
+	it("should use correct field name for refreshTokenExpiresAt", () => {
+		const tables = getAuthTables({
+			account: {
+				fields: {
+					refreshTokenExpiresAt: "custom_refresh_token_expires_at",
+				},
+			},
+		});
+
+		const accountTable = tables.account;
+		const refreshTokenExpiresAtField =
+			accountTable.fields.refreshTokenExpiresAt;
+
+		expect(refreshTokenExpiresAtField.fieldName).toBe(
+			"custom_refresh_token_expires_at",
+		);
+	});
+
+	it("should not use accessTokenExpiresAt field name for refreshTokenExpiresAt", () => {
+		const tables = getAuthTables({
+			account: {
+				fields: {
+					accessTokenExpiresAt: "custom_access_token_expires_at",
+					refreshTokenExpiresAt: "custom_refresh_token_expires_at",
+				},
+			},
+		});
+
+		const accountTable = tables.account;
+		const refreshTokenExpiresAtField =
+			accountTable.fields.refreshTokenExpiresAt;
+		const accessTokenExpiresAtField = accountTable.fields.accessTokenExpiresAt;
+
+		expect(refreshTokenExpiresAtField.fieldName).toBe(
+			"custom_refresh_token_expires_at",
+		);
+		expect(accessTokenExpiresAtField.fieldName).toBe(
+			"custom_access_token_expires_at",
+		);
+		expect(refreshTokenExpiresAtField.fieldName).not.toBe(
+			accessTokenExpiresAtField.fieldName,
+		);
+	});
+
+	it("should use default field names when no custom names provided", () => {
+		const tables = getAuthTables({});
+
+		const accountTable = tables.account;
+		const refreshTokenExpiresAtField =
+			accountTable.fields.refreshTokenExpiresAt;
+		const accessTokenExpiresAtField = accountTable.fields.accessTokenExpiresAt;
+
+		expect(refreshTokenExpiresAtField.fieldName).toBe("refreshTokenExpiresAt");
+		expect(accessTokenExpiresAtField.fieldName).toBe("accessTokenExpiresAt");
+	});
+});
diff --git a/packages/better-auth/src/db/get-tables.ts b/packages/better-auth/src/db/get-tables.ts
index f294ec788d..4a416c942d 100644
--- a/packages/better-auth/src/db/get-tables.ts
+++ b/packages/better-auth/src/db/get-tables.ts
@@ -225,7 +225,7 @@ export const getAuthTables = (
 					type: "date",
 					required: false,
 					fieldName:
-						options.account?.fields?.accessTokenExpiresAt ||
+						options.account?.fields?.refreshTokenExpiresAt ||
 						"refreshTokenExpiresAt",
 				},
 				scope: {