Income Tax Return 2026 Last Date (30 September): How to Match It with Your FBR Digital Invoices

This guide is for sales tax registered shops, traders and firms that must file an income tax return. It gives the last date, shows why your income tax figures must agree with your FBR digital invoices, and lists what to check before you press Submit.

FBR has fixed 30 September 2026 as the last date for income tax returns for tax year 2026. Tax year 2026 means 1 July 2025 to 30 June 2026. The date applies to individuals, sole proprietors and AOPs (Association of Persons, such as a partnership firm). A company with a 30 June year end files by 31 December 2026. Filing late now costs much more. The Finance Act 2026 raised the surcharge for getting back on the income tax Active Taxpayers List to Rs 25,000 for an individual.

Your monthly sales tax returns do not replace this return. They are two different taxes and two different forms. But FBR now holds a copy of every sales invoice you posted through digital invoicing, so the two sets of numbers should tell the same story.

Digital invoicing means your billing software sends each sales tax invoice to FBR as you make it. FBR sends back an IRN (Invoice Reference Number, the unique number FBR gives every invoice) and a QR code. These invoices flow into Annexure-C (the list of sales in your monthly sales tax return). 'How Digital Invoicing Feeds Your Sales Tax Return (Annexure-C) in 2026' explains that link.

So for tax year 2026, FBR can add up twelve months of your posted invoices, from July 2025 to June 2026. It can then compare that total with the turnover in your income tax return. Turnover means your total sales for the year. FBR can also see your purchases, because your suppliers post their invoices to you with your NTN on them.

A gap is not always wrong. But an unexplained gap is exactly what draws a notice. It can lead to an audit or an amended assessment (FBR changing the tax you declared). The simple way to stay safe is to reconcile before you file, and keep a short note of every difference.

FBR is also moving e-invoicing into the income tax law itself. 'FBR E-Invoicing Linked to Income Tax: Draft Income Tax Rules 2026 Explained' covers that change.

Step 1: Total your sales. Download or export all invoices you posted to FBR for July 2025 to June 2026. Use the value before sales tax. Section 113 of the Income Tax Ordinance 2001 says turnover does not include sales tax or federal excise duty.

Step 2: Take off returns and discounts. Subtract credit notes (documents that reduce an earlier sale, for example when goods come back). Add debit notes (documents that increase an earlier sale). Trade discounts shown on the invoice also reduce turnover. 'Debit Notes and Credit Notes in FBR Digital Invoicing' shows how these are posted.

Step 3: Add sales that are not in digital invoicing. Examples are income from services taxed by a province, rent or other income. These belong in the income tax return even though they never reached FBR's invoicing system.

Step 4: Check your sales tax returns. Your twelve monthly returns should show the same sales as your posted invoices. If one month is wrong, fix the sales tax return first. 'How to Revise a Sales Tax Return After Digital Invoicing (2026): 120 Days, 60 Days and the Right Order' explains the time limits.

Step 5: Collect tax already taken from you. Many buyers deduct income tax when they pay you. This is withholding tax (tax your buyer cuts from the payment and deposits for you). Ask each buyer for the certificate and match it with the deductions shown in IRIS (FBR's online tax portal).

Step 6: Match your purchases. Your cost of goods in the income tax return should be close to the purchase invoices shown in your Annexure-A. Purchases from unregistered sellers will not appear there, so keep their bills.

Step 7: Keep the proof. Save the reconciliation, the invoice export and the certificates. 'FBR Digital Invoicing Record-Keeping: Six-Year Retention, Digital Signatures & Audit Readiness (2026)' explains how long to keep records.

If you miss 30 September 2026, you drop off the income tax Active Taxpayers List for the year. To get back on, you pay a surcharge under section 182A. The Finance Act 2026 raised it from Rs 1,000 to Rs 25,000 for individuals. Tax firms report Rs 50,000 for AOPs and Rs 100,000 for companies. A separate penalty for a late return under section 182 can also apply. Being off the list means higher withholding tax on many payments.

The income tax list is not the same as the sales tax list. A business can be active for one and inactive for the other. 'Sales Tax Active Taxpayer List (ATL) 2026: How to Check It, Why You Drop Off and How to Get Back On' explains the sales tax side.

The Finance Act 2026 also added a 10% tax credit for businesses that invest in integrating with FBR. It is claimed in the income tax return for the tax year the system is installed and fully set up. The Act took effect on 1 July 2026, so ask your advisor whether your set-up falls in tax year 2026 or 2027. 'FBR Digital Invoicing Tax Credit: Section 64D 10% Incentive (Finance Act 2026)' has the details.

Watch for news of an extension, but do not plan on one. This guide is general information, not tax advice. For your own return, speak to your tax advisor.

Digi Invoice keeps every invoice you post, with its IRN, in one list you can export for the year. That makes this reconciliation a short job. Create a free account to start.

Tax year — the 12 months your return covers. Tax year 2026 runs from 1 July 2025 to 30 June 2026.

Turnover — your total sales for the year, without sales tax.

Reconciliation — putting two sets of numbers side by side and explaining every difference.

Withholding tax — tax your buyer deducts from a payment to you and deposits with FBR in your name.

Surcharge — an extra fixed amount you pay to be put back on the Active Taxpayers List after the deadline.

For more terms, see 'FBR Digital Invoicing Dictionary — 25 Key Terms Explained'.