diff --git a/src/modules/record/components/StepRecord.vue b/src/modules/record/components/StepRecord.vue
index c5efb70..2832577 100644
--- a/src/modules/record/components/StepRecord.vue
+++ b/src/modules/record/components/StepRecord.vue
@@ -4,6 +4,7 @@ import { formatDiffInMinutes } from '@/shared/format-date'
 import { toISODate } from '@/shared/types/date'
 import { computed, onUnmounted, ref } from 'vue'
 import { useTaskRecordStore } from '../stores/useTaskRecordStore'
+import { is10PercentOffThanEstimation } from '@/modules/record/services/compare-with-estimation'
 
 const props = defineProps<{
   taskId: string
@@ -52,12 +53,15 @@ const duration = computed(() => {
   )
 })
 
-const isGreaterThanEstimation = computed(() => {
+const isOffEstimation = computed(() => {
   if (!step.value || !stepRecord.value || !duration.value) {
     return false
   }
 
-  return duration.value > step.value.estimation
+  return is10PercentOffThanEstimation({
+    estimation: step.value.estimation,
+    duration: duration.value
+  })
 })
 </script>
 
@@ -80,9 +84,9 @@ const isGreaterThanEstimation = computed(() => {
       </div>
     </td>
     <td class="status">
-      <span v-if="stepRecord?.end && !isGreaterThanEstimation">✅</span>
-      <span v-else-if="isGreaterThanEstimation">❓</span>
-      <span v-else>⌛</span>
+      <span v-if="!stepRecord?.end">⌛</span>
+      <span v-else-if="isOffEstimation">❓</span>
+      <span v-else>✅</span>
     </td>
     <td class="step-title">
       {{ step.title }}
diff --git a/src/modules/record/services/compare-with-estimation.test.ts b/src/modules/record/services/compare-with-estimation.test.ts
new file mode 100644
index 0000000..ce0724b
--- /dev/null
+++ b/src/modules/record/services/compare-with-estimation.test.ts
@@ -0,0 +1,19 @@
+import { is10PercentOffThanEstimation } from '@/modules/record/services/compare-with-estimation'
+import { describe, expect, it } from 'vitest'
+
+describe('compareWithEstimation', () => {
+  it('should tells if the estimation is off by 10% or more', () => {
+    expect(is10PercentOffThanEstimation({ estimation: 10, duration: 9 })).toBe(
+      false
+    )
+    expect(is10PercentOffThanEstimation({ estimation: 5, duration: 4 })).toBe(
+      false
+    )
+    expect(is10PercentOffThanEstimation({ estimation: 10, duration: 5 })).toBe(
+      true
+    )
+    expect(is10PercentOffThanEstimation({ estimation: 10, duration: 8 })).toBe(
+      true
+    )
+  })
+})
diff --git a/src/modules/record/services/compare-with-estimation.ts b/src/modules/record/services/compare-with-estimation.ts
new file mode 100644
index 0000000..8c22e9c
--- /dev/null
+++ b/src/modules/record/services/compare-with-estimation.ts
@@ -0,0 +1,9 @@
+export const is10PercentOffThanEstimation = ({
+  estimation,
+  duration
+}: {
+  estimation: number
+  duration: number
+}) => {
+  return Math.abs(duration - estimation) > Math.max(estimation * 0.1, 1)
+}