Are stacked discounts additive?

They compound — the second applies to the post-first price, so the result is less than the sum.

Is VAT before or after discount?

After discount — the standard behavior in most POS systems.

No, add shipping separately for a full comparison.

Advertised sums percentages; effective is the actual compound.

Only theoretically — final price would be zero.

Compute final price after one or two discounts, with optional VAT.

Quick utilityFully localized assumptionsGlobal-readyInteractive chart

Last updated: 2026-05-31

This calculator uses generic assumptions. Use advanced mode to override them for a more accurate result.

Source: default

Final = Price · (1 − d1) · (1 − d2) · (1 + VAT)

Are stacked discounts additive?: They compound — the second applies to the post-first price, so the result is less than the sum.
Is VAT before or after discount?: After discount — the standard behavior in most POS systems.
Does it include shipping?: No, add shipping separately for a full comparison.
Advertised vs effective discount?: Advertised sums percentages; effective is the actual compound.
Is 100% possible?: Only theoretically — final price would be zero.

Results are estimates and not professional advice. Verify important decisions with a qualified professional.