Who Must File a Monthly Sales Tax Return?
Every person registered for sales tax (holding an STRN) — manufacturers, importers, wholesalers, distributors, and Tier-1 retailers — must file a monthly sales tax return regardless of whether there was any taxable activity that month. Even with zero sales, a "nil return" must be filed.
Monthly Filing Timeline
| Stage | Deadline | What's Submitted |
|---|---|---|
| Annexure-C | 10th of next month | Sales invoice data |
| Tax Payment | 15th of next month | Payment via bank/online challan |
| ST-3 Return | 18th of next month | Final return with input/output tax reconciliation |
Missing any of these three steps triggers a default surcharge (interest-like penalty) and may attract a penalty notice. Annexure-C, in particular, is often missed by businesses unfamiliar with the two-stage filing structure.
Input Tax vs Output Tax
- Output tax — sales tax you charge customers on your sales (typically 18%, or 16%/13%/15% provincial for services)
- Input tax — sales tax you paid on purchases/inputs, which can be adjusted (deducted) against your output tax
- Net payable — output tax minus adjustable input tax equals the amount you pay to FBR for that month
Input tax adjustment requires valid sales tax invoices from properly registered suppliers. Certain items are on FBR's "blocked" list and cannot be adjusted even with a valid invoice — for example, tax on certain vehicles or non-business-related purchases.
Penalties for Late or Non-Filing
| Default | Penalty |
|---|---|
| Late filing of return | Rs. 10,000 or 0.1% of tax payable per day, whichever is higher (capped) |
| Non-payment of tax | Default surcharge (KIBOR-based) plus penalty |
| Persistent non-filing | Risk of audit, suspension/blacklisting of STRN |
Frequently Asked Questions
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WhatsApp Now — 0328-4675162Business Tax Compliance in Pakistan — 2026 Complete Guide
Running a business in Pakistan requires compliance with multiple tax regimes simultaneously: Income Tax (FBR), Sales Tax (STRN), withholding tax compliance obligations as an employer and buyer, and provincial service tax (SRB, PRA, KPRA, BRA). Missing any one of these can trigger penalties and notices.
Business Tax Calendar 2026-27
| Filing | Due Date | Penalty for Late |
|---|---|---|
| sales tax return filing Return | 18th of next month | Rs.10,000/month |
| Monthly WHT Statement | 15th of next month | 0.1% of tax per day |
| Quarterly Advance Tax | 25th of Sept/Dec/Mar/Jun | 12% annual markup |
| Annual income tax return filing | September 30 | Rs.10,000 or 0.1% of tax |
| Audit documentation | On demand | Rs.1,000,000 or more if non-compliant |
NTN Registration for Business
Every business entity — sole proprietor, partnership, private limited company, or NGO — must have a unique NTN. For companies, the NTN is linked to the CNIC of the principal officer. Registration is free via IRIS or in person at your Regional Tax Office (RTO).
STRN (Sales Tax Registration Number)
You must register for STRN if your annual taxable supplies exceed Rs.10 million. Once registered, you must:
- Charge 17% standard sales tax on goods (or applicable reduced rate)
- Issue FBR-compliant invoices with your STRN
- File monthly returns and pay net tax (output minus input)
- Maintain records for 5 years minimum
Minimum Tax — Section 113
If a company's normal tax liability is less than 1.25% of gross turnover, it must pay minimum tax. This applies even if the company shows a loss. For certain sectors (distributors, dealers), minimum tax rates differ.
Super Tax — Large Companies
Companies with income exceeding Rs.150 million pay Super Tax at 1-10% depending on income bracket and sector. Banking companies face a 10% super tax rate. This is on top of the normal 29% corporate tax rate.
For complete business tax setup, bookkeeping, and FBR compliance, contact Kamboh Associates at 0328-4675162.
Frequently Asked Questions — Business Tax Pakistan 2026
What is the corporate tax rate in Pakistan 2026?
The standard corporate tax rate in Pakistan for 2026-27 is 29% for private companies. Banks pay a higher rate of 39% (corporate tax 29% plus super tax 10%). Listed companies benefit from a 2% tax credit if they increase their tax paid from the previous year by 20%. Small companies (defined under the Companies Act) pay a reduced rate of 20% if meeting eligibility criteria.
When must a business register for sales tax (STRN) in Pakistan?
A business must register for Sales Tax Registration Number (STRN) if its annual taxable supplies of goods or services exceed Rs.10 million. Additionally, FBR can compulsorily register any person or business they believe should be registered. Service providers in Punjab, Sindh, Khyber Pakhtunkhwa, and Balochistan must register with their respective provincial revenue authorities (PRA, SRB, KPRA, BRA) for service tax, with registration thresholds varying by province.
What is advance tax and how is it calculated for businesses?
Advance tax is paid quarterly by companies and businesses with annual tax liability above Rs.100,000. Each quarterly installment is 25% of the last assessed tax liability or estimated current year tax, whichever is higher. Installments are due on September 25, December 25, March 25, and June 15. Under-payment of advance tax results in 12% annual markup on the shortfall.
What is the difference between a sole proprietorship and an AOP for tax purposes?
A sole proprietorship has no separate legal entity — all income is declared in the owner's personal income tax return. An Association of Persons (AOP) is a partnership or joint venture that files its own tax return at AOP tax rates (similar to individual slab rates). The key difference is that AOP income is taxed at the AOP level first, and then individual partners' shares are also included in their personal returns — creating a potential double taxation issue that requires careful planning.
What records must a business maintain under Pakistan tax law?
Under Section 174 of the Income Tax Ordinance, businesses must maintain proper accounts and records for at least 5 years from the end of the tax year. Required records include: sales and purchase invoices, cash receipts and payment vouchers, bank statements, payroll records and salary slips, stock registers, fixed asset schedules, and loan/liability documentation. For sales tax registered businesses, FBR requires additional records including output/input tax registers and STRN-compliant invoices.
Full-Service Business Tax Compliance
Kamboh Associates handles bookkeeping, sales tax, payroll tax, advance tax, and annual returns for businesses of all sizes. Monthly retainers from Rs.5,000.
Call / WhatsApp: 0328-4675162 | Office: 62-B, Johar Town, Lahore