diff --git a/__tests__/lib/fee-utils.test.ts b/__tests__/lib/fee-utils.test.ts
index 20596ee..1ab38a8 100644
--- a/__tests__/lib/fee-utils.test.ts
+++ b/__tests__/lib/fee-utils.test.ts
@@ -5,12 +5,19 @@ import {
   formatFee,
   calculateBatchFees,
   TYPICAL_FEES,
+  FEE_BUFFER_MULTIPLIER,
 } from "@/lib/fee-utils";
 
+describe("FEE_BUFFER_MULTIPLIER", () => {
+  it("exports expected 15% safety buffer multiplier", () => {
+    expect(FEE_BUFFER_MULTIPLIER).toBe(1.15);
+  });
+});
+
 describe("calculateFeeBreakdown", () => {
   it("applies 15% buffer to minResourceFee", () => {
     const result = calculateFeeBreakdown(100_000);
-    expect(result.totalEstimated).toBe(Math.ceil(100_000 * 1.15));
+    expect(result.totalEstimated).toBe(Math.ceil(100_000 * FEE_BUFFER_MULTIPLIER));
   });
 
   it("minFee plus bufferFee equals total", () => {
@@ -26,7 +33,7 @@ describe("calculateFeeBreakdown", () => {
   it("calculates estimatedUsd with custom xlmPrice", () => {
     const result = calculateFeeBreakdown(10_000_000, 0.5); // 1 XLM at $0.50
     expect(result.estimatedUsd).toBeCloseTo(
-      (0.5 * Math.ceil(10_000_000 * 1.15)) / 1e7,
+      (0.5 * Math.ceil(10_000_000 * FEE_BUFFER_MULTIPLIER)) / 1e7,
       5,
     );
   });
diff --git a/lib/fee-utils.ts b/lib/fee-utils.ts
index f778815..f2bd7a6 100644
--- a/lib/fee-utils.ts
+++ b/lib/fee-utils.ts
@@ -18,7 +18,7 @@ export function calculateFeeBreakdown(
   xlmPrice: number = XLM_PRICE,
 ): FeeBreakdown {
   // Apply 15% buffer to ensure inclusion
-  const bufferMultiplier = 1.15;
+  const bufferMultiplier = FEE_BUFFER_MULTIPLIER;
   const totalFee = Math.ceil(minResourceFee * bufferMultiplier);
   const bufferFee = totalFee - minResourceFee;
 
@@ -36,6 +36,11 @@ export function calculateFeeBreakdown(
 /**
  * Estimate typical fees for common operations
  */
+/**
+ * Default safety buffer multiplier (15%) applied to resource fees to ensure inclusion.
+ */
+export const FEE_BUFFER_MULTIPLIER = 1.15;
+
 export const TYPICAL_FEES = {
   createStream: { min: 50000, typical: 80000, unit: "stroops" },
   withdraw: { min: 30000, typical: 50000, unit: "stroops" },