What Is an Outstanding Invoice?
Any business that bills first and gets paid later carries a few of these.
An outstanding invoice is a bill you have already raised to a customer but have not yet received payment against. The sale is recorded, the tax invoice is issued, and the GST on it is already your liability. In India that wait is legally capped for micro and small suppliers at 45 days under the MSMED Act, 2006.
Where an Outstanding Invoice Sits in the Payment Cycle
An invoice turns outstanding the moment it leaves your billing counter, then moves through three stages:
- Within terms: outstanding, but the buyer is not late
- Past the invoice due date: still outstanding, now also overdue
- Paid or written off: it leaves the receivables ledger
Accountants sort them by how long each has been unpaid, a process called ageing. It turns a messy list into a queue you can work through.
| Ageing bucket | What it usually signals | Sensible next step |
|---|---|---|
| 0 to 30 days | Sitting within normal credit terms | Nothing yet, keep it on the watchlist |
| 31 to 60 days | Slipping past the agreed terms | Send a reminder, confirm the invoice was received |
| 61 to 90 days | Collection risk building up | Call the buyer, hold back fresh credit |
| Over 90 days | Recovery looking doubtful | Escalate, or use the MSME Samadhaan route |
Every bucket added together is your accounts receivable balance.
Difference Between an Outstanding Invoice and an Overdue Invoice
Most owners use the two words as though they mean the same thing. They do not, and the difference decides which bills your collections follow-up starts with.
| Aspect | Outstanding invoice | Overdue invoice |
|---|---|---|
| When it starts | The day the invoice is issued | The day after the due date |
| Is the buyer late? | Not necessarily | Yes |
| Interest liability | None during the credit period | Can apply under contract or the MSMED Act |
| Where it shows | Every unpaid bill on the receivables ledger | Only the subset past its due date |
| What it tells you | How much you have billed but not collected | How much collection has actually gone wrong |
Outstanding Invoice Example
Take an electrical goods wholesaler in Guwahati supplying a hardware chain across Assam on Net 30 terms. On 30 June 2026 the accounts clerk pulls an ageing report and finds three bills unpaid.
| Invoice no. | Invoice date | Due date | Amount (incl. GST) | Days outstanding | Status on 30 June |
|---|---|---|---|---|---|
| GW/26/1184 | 12 June 2026 | 12 July 2026 | Rs.1,84,600 | 18 | Outstanding, not yet due |
| GW/26/1102 | 28 April 2026 | 28 May 2026 | Rs.72,350 | 63 | Overdue by 33 days |
| GW/26/1047 | 09 March 2026 | 08 April 2026 | Rs.38,900 | 113 | Overdue by 83 days |
Note: this is an invented example for illustration only. The business, invoice numbers and amounts are not real.
All three are outstanding, adding up to Rs.2,95,850. Only Rs.1,11,250 is overdue, since the June bill has until 12 July to run. The March invoice sits in the over-90-day bucket and should worry anybody reading the report. To check the tax split, the GST invoice value calculator does the arithmetic.
Why Outstanding Invoices Deserve a Weekly Look
GST does not wait for your customer to pay. Output tax becomes payable on the invoice date under the time of supply rules, so the amount goes into that month’s GSTR-3B whether the buyer has settled or not. Cash leaves before it arrives.
A legal clock runs alongside. Section 15 of the MSMED Act, 2006 requires buyers to pay micro and small enterprise suppliers within 15 days where no written agreement exists and within 45 days where one does, and Section 16 adds compound interest at three times the RBI bank rate once that limit is crossed.
Since AY 2024-25, Section 43B(h) of the Income Tax Act has also denied the buyer a deduction for such an expense until it is actually paid.
The rule flips when you are the buyer. Pay your supplier within 180 days of the invoice date or the input tax credit already claimed must be reversed with interest, under the second proviso to Section 16(2) of the CGST Act read with Rule 37. A GST return filing checklist keeps both sides reconciled.
Get the Best Outstanding Invoice Tracking
If your outstanding list lives in a spreadsheet that one person updates, you already know how that ends. Petpooja Invoice, used by 8,000+ businesses for GST billing and inventory, keeps a live receivables ageing report so every unpaid bill lands in its own bucket.
Invoices go out to buyers over WhatsApp, and the reporting side shows how each customer’s billing has moved over time. Restaurants billing on Petpooja POSS get the same view.
That is what the best outstanding invoice tracking buys you. Open the dashboard on a Monday and picture your own collections list, already sorted by who to call first.
Frequently Asked Questions
Yes, they mean the same thing in everyday accounting. Both describe a bill that has been issued but not yet settled, whether or not the due date has passed.
There is no fixed day in law. It is treated as doubtful once it sits well past terms with no response, and becomes a bad debt only when written off in the books, as Section 36(1)(vii) of the Income Tax Act requires for the deduction.
Regulation says yes. Output tax arises on the invoice date under the time of supply provisions, so it goes into your return for that period even if the customer pays months later.
Only once it is overdue, and only if your contract carries a late payment clause. For registered micro and small suppliers, Section 16 of the MSMED Act applies compound interest at three times the RBI bank rate whatever the contract says.
It varies by industry and credit terms, so there is no published benchmark. The useful comparison is your own: track what share of receivables has crossed its due date, and watch whether that share grows month on month.
