How the calculation works
- VAT-inclusive prices — if the price already includes VAT, it's first divided by 1.12 to get the VAT-exclusive base.
- Discount — your percentage is taken off that base amount.
- VAT — 12% is added back on the discounted amount to give the final price.
- Senior Citizen / PWD — a fixed 20% discount on the VAT-exclusive price and no VAT, under RA 9994 and RA 10754.
Frequently asked questions
How is the Senior Citizen / PWD discount different?
It's a statutory 20% discount and the purchase is VAT-exempt. The 20% is applied to the price net of VAT, and no 12% VAT is added on top.
What does “price already includes 12% VAT” do?
It tells the calculator to strip the VAT out first, so the discount is applied to the true selling price rather than to the VAT as well.
Does the 20% discount apply to everything?
No. It applies to qualified purchases for eligible seniors and PWDs (such as medicines, basic necessities, and certain services). Check eligibility and current rules with the BIR.
Is my information uploaded?
No. The calculation runs entirely in your browser. Nothing you enter is stored or sent to a server.