Percentage calculator
Calculate proportions, increases, decreases and changes between values.
MATHDiscount calculator
Combine discounts, shipping and taxes and compare final prices.
Your starting point
Shipping, margins, increases and withholding
For example, 20;10 applies 20% then 10% to the remaining price. Shipping charged at cost with the same VAT.
Your result
Editable example; you have not calculated your own inputs yet.
Total payable€80.00
Price per unit€80.00
Taxable base€80.00
VAT€0.00
Withholding€0.00
Profit before income tax€80.00
Sales margin100 %
Markup on cost—
Equivalent discount20 %
Discount savings, excluding VAT€20.00
View full table · 10 rows
| Item | Value |
|---|---|
| Total payable | 80 |
| Price per unit | 80 |
| Taxable base | 80 |
| VAT | 0 |
| Withholding | 0 |
| Profit before income tax | 80 |
| Sales margin | 100 |
| Markup on cost | — |
| Equivalent discount | 20 |
| Discount savings, excluding VAT | 20 |
Method and assumptions
Order: increase, successive discounts, remove included VAT, add net shipping, VAT and withholding.
Shipping charged at cost, with the same VAT and withholding as goods. No country-specific tax rules.
Profit excludes VAT and withholding. Unit cost excludes VAT; withholding applies to the base including shipping.
What if you change the plan?
Keep this result, change your inputs and compare.
Worked example and interpretation
An item priced at 100 with successive discounts of 20% and 10% costs 100 × 0.8 × 0.9 = 72 before shipping and tax. The saving is 28%, not 30%. Enter each discount separately to preserve the sequence.
What to check
Compare final totals: 72 plus 12 shipping costs 84, more than 80 with free shipping. Check whether the starting price already includes tax.