How to Account for Supplier Discounts: GRN vs Purchase Invoice Best Practices
When “Discard GRN Discount” is Turned ON
How it Works:
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Discounts from suppliers are not recorded in the GRN (Goods Received Note) ledger.
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The GRN only reflects the inventory or goods at their gross value (before discount).
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The discount is entirely recognized at the purchase invoice stage.
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This results in the discount being credited as income (Discount Received) only when the purchase invoice is posted.
Impact:
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The Discount Received account will show the total discount earned as a credit in your trial balance and profit & loss (as actual income).
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The inventory or standard cost is not influenced by supplier discounts, as discounts are handled separately in the GL (not deducted directly from inventory cost).
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This approach makes it easy to track and report total discounts received from suppliers.
When “Discard GRN Discount” is Turned OFF
How it Works:
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Discounts are recorded at the GRN stage as a debit entry to Discount Received.
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When the purchase invoice is matched, the discount is credited (reversed) in the Discount Received account.
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The net effect in the Discount Received account is zero, as every debit at GRN is offset by a credit at invoice.
Impact:
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You cannot see the total discounts received in your trial balance or profit & loss, because the account nets to zero for each transaction.
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The discount benefits are “absorbed” into the inventory value, so the inventory is recorded at net-of-discount cost on the GRN date.
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While your inventory values are accurate, you lose clear visibility/reporting of discount income, which is often needed for supplier negotiation analysis or statutory disclosures.
Practical Example
Suppose you buy goods for INR 1,000 with a discount of INR 100:
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If “Discard GRN Discount” is ON:
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GRN: Inventory Dr. 1,000 | GRN Clearing Cr. 1,000
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Invoice: Accounts Payable Dr. 900 | Discount Received Cr. 100 | GRN Clearing Cr. 1,000
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If “Discard GRN Discount” is OFF:
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GRN: Inventory Dr. 900 | Discount Received Dr. 100 | GRN Clearing Cr. 1,000
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Invoice: Accounts Payable Dr. 900 | Discount Received Cr. 100 | GRN Clearing Cr. 1,000
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Discount Received gets Dr. 100 at GRN, Cr. 100 at invoice—the balance becomes 0.
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Key Differences
| Option | Discount in GRN? | Discount in Invoice? | Discount Account Impact | Inventory Value |
|---|---|---|---|---|
| Discard ON | No | Yes (credit) | Shows total income | Gross cost |
| Discard OFF | Yes (debit) | Yes (credit/reverse) | Nets to zero | Net of discount |
Why the “ON” Option is Considered Best Practice
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Keeps inventory and standard cost clean and auditable (without discount manipulation).
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Provides transparent reporting on total discounts received, which is vital for supplier performance analysis and statutory reporting.
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Fits with leading ERP/Accounting standards for purchase discount handling
