Retailer Sales Tax Calculator (Tier-1)

The retailer sales tax calculator is for Tier-1 retailers - large shops, department stores and chains - who are required to charge 18% sales tax and file monthly ST-03 returns. Enter monthly sales and purchases with tax, and the calculator estimates the output tax, input credit and the net amount to deposit.

Since 2021, FBR has pushed retailers into the active tax net through the Point of Sale (POS) scheme: Tier-1 retailers must use approved billing machines that transmit invoices to FBR in real time, and customers who ask for a receipt can win a prize. The calculator gives you the monthly arithmetic behind that obligation.

Enter your monthly sales including tax, your purchases including tax, and the calculator computes output tax, input credit and the net deposit. Toggle the tier status to see the different compliance treatment between Tier-1 and Tier-2 retailers.

• Enter monthly sales including tax.
• Enter purchases including tax for the same month.
• Read output, input and net tax payable.
• Adjust the inputs to test the effect of better documentation.

Tier-1 retailers charge 18% sales tax on every sale and must issue an invoice from an FBR-approved POS billing machine that transmits the data in real time. Output tax is the tax collected from customers (sales / 1.18). Input tax is the tax paid on purchases supported by valid invoices. The monthly deposit is output minus input.

POS data is matched against the ST-03 return: any sale not reflected in the return triggers automatic adjustments and notices. The calculator mirrors that invoice-level arithmetic so you can predict your monthly deposit before the return window closes.

• Output tax = sales inclusive / 1.18 x 0.18.
• Input tax = documented purchases inclusive / 1.18 x 0.18.
• Net deposit = output minus input.

A Tier-1 clothing store records monthly sales of Rs 5,000,000 including tax. Its output tax is 5,000,000 / 1.18 x 0.18 = Rs 762,712. Its documented purchases are Rs 2,000,000 inclusive, giving input tax of Rs 305,085. The net deposit for the month is Rs 457,627, filed by the 15th.

• Operating a manual billing system in a Tier-1 store - this is a direct violation with heavy penalties.
• Claiming input tax on undocumented purchases - the invoice and the NTN must be genuine.
• Not transmitting POS data - the return must reconcile with the FBR dashboard.