diff --git a/src/core/utils/convert.ts b/src/core/utils/convert.ts
index 185d9df..f1779bc 100644
--- a/src/core/utils/convert.ts
+++ b/src/core/utils/convert.ts
@@ -27,6 +27,7 @@ export function sanitizeNumericString(
   const allowDecimal = options.allowDecimal !== false
   let s = persian2english(String(raw ?? '').trim())
     .replace(/[٬,\s]/g, '')
+    .replace(/[−–—]/g, '-')
     .replace(/٫/g, '.')
     .replace(/\//g, '.')
 
diff --git a/src/core/utils/usePrice.ts b/src/core/utils/usePrice.ts
index 597b4f4..e7ab5ba 100644
--- a/src/core/utils/usePrice.ts
+++ b/src/core/utils/usePrice.ts
@@ -2,11 +2,15 @@ import { persian2english, parseNumericValue, sanitizeNumericString } from '@core
 
 export function usePrice(price: number | string, digit = true, unit = 'ریال') {
   const n = typeof price === 'number' ? price : parseNumericValue(price)
-  let _price = Number.isFinite(n) ? String(n) : persian2english(String(price ?? ''))
-  if (digit && Number.isFinite(n)) {
+  const finite = Number.isFinite(n)
+  const sign = finite && n < 0 ? '-' : ''
+  const abs = finite ? Math.abs(n) : NaN
+  let _price = finite ? String(abs) : persian2english(String(price ?? ''))
+  if (digit && Number.isFinite(abs)) {
     _price = _price.replace(/\B(?=(\d{3})+(?!\d))/g, ',')
   }
-  return `${_price} ${unit}`
+  const shown = finite ? `${sign}${_price}` : _price
+  return unit ? `${shown} ${unit}` : shown
 }
 
 export function useTowDecimal(num: string | number): string | number {
diff --git a/src/pages/menuPages/customers/specialPrice/components/SignedProfitInput.vue b/src/pages/menuPages/customers/specialPrice/components/SignedProfitInput.vue
new file mode 100644
index 0000000..feedd60
--- /dev/null
+++ b/src/pages/menuPages/customers/specialPrice/components/SignedProfitInput.vue
@@ -0,0 +1,152 @@
+<template>
+  <div class="signed-profit" :class="rootClass">
+    <a-radio-group
+      v-model:value="mode"
+      button-style="solid"
+      class="signed-profit__modes w-full"
+      @change="onModeChange"
+    >
+      <a-radio-button value="profit" class="signed-profit__radio signed-profit__radio--profit">
+        <span class="signed-profit__sign">+</span>
+        سود
+      </a-radio-button>
+      <a-radio-button value="discount" class="signed-profit__radio signed-profit__radio--discount">
+        <span class="signed-profit__sign">−</span>
+        تخفیف
+      </a-radio-button>
+    </a-radio-group>
+
+    <BasicInput
+      :value="absDisplay"
+      type="price"
+      addon-before="ریال"
+      place-holder="۰"
+      @update:value="onAmountChange"
+    />
+
+    <p class="signed-profit__hint">{{ hint }}</p>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { computed, ref, watch } from 'vue'
+import BasicInput from '@/components/BasicInput.vue'
+import { parseNumericValue } from '@core/utils/convert'
+
+const props = defineProps<{
+  value?: number | string | null
+  kind: 'buy' | 'sell'
+}>()
+
+const emit = defineEmits<{
+  'update:value': [value: number]
+}>()
+
+const numeric = computed(() => {
+  const n = typeof props.value === 'number' ? props.value : parseNumericValue(props.value)
+  return Number.isFinite(n) ? n : 0
+})
+
+const mode = ref<'profit' | 'discount'>('profit')
+
+watch(
+  numeric,
+  (n) => {
+    if (n < 0) mode.value = 'discount'
+    else if (n > 0) mode.value = 'profit'
+  },
+  { immediate: true },
+)
+
+const absDisplay = computed(() => Math.abs(numeric.value))
+
+const rootClass = computed(() =>
+  mode.value === 'discount' ? 'signed-profit--discount' : 'signed-profit--profit',
+)
+
+const hint = computed(() => {
+  if (props.kind === 'buy') {
+    return mode.value === 'discount'
+      ? 'تخفیف: از قیمت خرید مشتری کم می‌شود'
+      : 'سود: به قیمت خرید مشتری اضافه می‌شود'
+  }
+  return mode.value === 'discount'
+    ? 'تخفیف: به قیمت فروش مشتری اضافه می‌شود'
+    : 'سود: از قیمت فروش مشتری کم می‌شود'
+})
+
+function emitSigned(abs: number, discount: boolean) {
+  const safe = Number.isFinite(abs) ? Math.abs(Math.round(abs)) : 0
+  emit('update:value', discount && safe > 0 ? -safe : safe)
+}
+
+function onModeChange() {
+  emitSigned(absDisplay.value, mode.value === 'discount')
+}
+
+function onAmountChange(raw: string | number) {
+  const n = typeof raw === 'number' ? raw : parseNumericValue(raw)
+  emitSigned(Number.isFinite(n) ? n : 0, mode.value === 'discount')
+}
+</script>
+
+<style scoped lang="less">
+.signed-profit {
+  display: flex;
+  flex-direction: column;
+  gap: 0.5rem;
+}
+
+.signed-profit__modes {
+  display: flex;
+}
+
+.signed-profit__modes :deep(.ant-radio-button-wrapper) {
+  flex: 1;
+  text-align: center;
+  font-weight: 700;
+}
+
+.signed-profit__sign {
+  display: inline-block;
+  margin-left: 0.3rem;
+  font-weight: 800;
+}
+
+.signed-profit__hint {
+  margin: 0;
+  font-size: 0.75rem;
+  line-height: 1.5;
+  color: var(--admin-text-secondary, rgba(0, 0, 0, 0.45));
+}
+
+.signed-profit--profit .signed-profit__hint {
+  color: #15803d;
+}
+
+.signed-profit--discount .signed-profit__hint {
+  color: #b91c1c;
+}
+
+.signed-profit__modes :deep(.ant-radio-button-wrapper-checked.signed-profit__radio--profit) {
+  background: #15803d !important;
+  border-color: #15803d !important;
+  color: #fff !important;
+}
+
+.signed-profit__modes :deep(.ant-radio-button-wrapper-checked.signed-profit__radio--discount) {
+  background: #b91c1c !important;
+  border-color: #b91c1c !important;
+  color: #fff !important;
+}
+
+html[data-theme='dark'] .signed-profit--profit .signed-profit__hint,
+.dark .signed-profit--profit .signed-profit__hint {
+  color: #86efac;
+}
+
+html[data-theme='dark'] .signed-profit--discount .signed-profit__hint,
+.dark .signed-profit--discount .signed-profit__hint {
+  color: #fca5a5;
+}
+</style>
diff --git a/src/pages/menuPages/customers/specialPrice/components/SpecialPriceEditorForm.vue b/src/pages/menuPages/customers/specialPrice/components/SpecialPriceEditorForm.vue
index cc049c7..190f91b 100644
--- a/src/pages/menuPages/customers/specialPrice/components/SpecialPriceEditorForm.vue
+++ b/src/pages/menuPages/customers/specialPrice/components/SpecialPriceEditorForm.vue
@@ -43,11 +43,11 @@
     </a-form-item>
 
     <div class="grid gap-3 md:grid-cols-2">
-      <a-form-item label="سود فروش" name="profit_sell">
-        <BasicInput v-model:value="form.profit_sell" type="price" addon-before="ریال" />
+      <a-form-item label="سود / تخفیف فروش" name="profit_sell">
+        <SignedProfitInput v-model:value="form.profit_sell" kind="sell" />
       </a-form-item>
-      <a-form-item label="سود خرید" name="profit_buy">
-        <BasicInput v-model:value="form.profit_buy" type="price" addon-before="ریال" />
+      <a-form-item label="سود / تخفیف خرید" name="profit_buy">
+        <SignedProfitInput v-model:value="form.profit_buy" kind="buy" />
       </a-form-item>
     </div>
 
@@ -76,6 +76,7 @@ import { debounce } from 'lodash'
 import { onMounted, ref, watch } from 'vue'
 import BasicInput from '@/components/BasicInput.vue'
 import BasicSelect from '@/components/BasicSelect.vue'
+import SignedProfitInput from './SignedProfitInput.vue'
 import { syncAndLoadCategories, type CategorySelectItem } from '@/utils/categorySelect'
 import {
   getProductsByCategories,
@@ -87,8 +88,8 @@ export type SpecialPriceForm = {
   category_names: string[]
   product_ids: number[]
   customer_ids: number[]
-  profit_buy: number | string
-  profit_sell: number | string
+  profit_buy: number
+  profit_sell: number
   show_product: boolean
   is_active: boolean
 }
diff --git a/src/pages/menuPages/customers/specialPrice/hooks/specialPriceColumns.ts b/src/pages/menuPages/customers/specialPrice/hooks/specialPriceColumns.ts
index f94ea9d..a13b356 100644
--- a/src/pages/menuPages/customers/specialPrice/hooks/specialPriceColumns.ts
+++ b/src/pages/menuPages/customers/specialPrice/hooks/specialPriceColumns.ts
@@ -2,6 +2,15 @@ import type { BaseTableColumn } from '@core/type/baseTable'
 import { usePrice } from '@core/utils/usePrice'
 import { toJalali } from '@core/utils/useDataTime'
 
+function formatSignedProfit(raw: unknown) {
+  const n = Number(raw ?? 0)
+  if (!Number.isFinite(n) || n === 0) {
+    return usePrice(0, true, '')
+  }
+  const label = n < 0 ? 'تخفیف' : 'سود'
+  return `${label} ${usePrice(Math.abs(n), true, '')}`
+}
+
 export function getSpecialPricePackageColumns(): BaseTableColumn[] {
   return [
     {
@@ -37,14 +46,14 @@ export function getSpecialPricePackageColumns(): BaseTableColumn[] {
       dataIndex: 'profit_buy',
       key: 'profit_buy',
       type: 'Text',
-      customRender: ({ record }) => usePrice(record.profit_buy ?? 0, true, '')
+      customRender: ({ record }) => formatSignedProfit(record.profit_buy)
     },
     {
       title: 'سود فروش',
       dataIndex: 'profit_sell',
       key: 'profit_sell',
       type: 'Text',
-      customRender: ({ record }) => usePrice(record.profit_sell ?? 0, true, '')
+      customRender: ({ record }) => formatSignedProfit(record.profit_sell)
     },
     {
       title: 'نمایش محصول',
diff --git a/src/pages/menuPages/customers/specialPrice/index.vue b/src/pages/menuPages/customers/specialPrice/index.vue
index 23986e0..6e3872c 100644
--- a/src/pages/menuPages/customers/specialPrice/index.vue
+++ b/src/pages/menuPages/customers/specialPrice/index.vue
@@ -88,8 +88,8 @@ async function openEdit(record: any) {
       category_names: data?.category_names ?? [],
       product_ids: (data?.product_ids ?? []).map(Number),
       customer_ids: (data?.customer_ids ?? []).map(Number),
-      profit_buy: data?.package?.profit_buy ?? 0,
-      profit_sell: data?.package?.profit_sell ?? 0,
+      profit_buy: Number(data?.package?.profit_buy ?? 0),
+      profit_sell: Number(data?.package?.profit_sell ?? 0),
       show_product: Boolean(data?.package?.show_product ?? true),
       is_active: Boolean(data?.package?.is_active ?? true)
     }