Price Increase Calculator
Calculate a planned new price from a percentage increase, or measure the percentage change between an old and new price—then test the arithmetic against margin and volume assumptions.
The live Price Increase Calculator has two modes: apply a non-negative percentage to a current price, or compare an old price with a new price. It returns price-change arithmetic only. It does not forecast demand or guarantee higher profit.
What a price increase is in this tool
A price increase is the change from a previous selling price to a new selling price, expressed as an amount and usually as a percentage of the previous price. Use one currency and one VAT/tax treatment for every value in the same run.
Two calculator modes (aligned with the live tool)
Mode 1 — Current Price + Increase % → New Price
Use when you know the current price and the planned increase percentage.
Increase amount = Current price × (Increase % ÷ 100)
New price = Current price + Increase amount
Validation: Current price must be greater than 0. Increase % must be 0 or greater.
Outputs shown: increase amount and new price. Increase % is an input in this mode (not recalculated as an output).
Mode 2 — Old Price + New Price → Increase %
Use when both the old and new prices are known and you need the change amount and percentage.
Change amount = New price − Old price
Change % = (Change amount ÷ Old price) × 100
Validation: Old price must be greater than 0. New price must be 0 or greater.
If the change amount is negative, the tool reports that the price decreased. Outputs shown: change amount and change % (new price is the input).
VAT and tax consistency
For business pricing analysis, use tax-exclusive values when VAT or sales tax is collected, remitted, or recoverable. Current/old/new prices and any cost figures used in a follow-on margin check must use the same tax treatment. If tax-inclusive cash prices are used for an informal comparison, label that basis clearly and do not mix inclusive and exclusive figures in one calculation. The calculator does not convert currency, compute VAT, or determine recoverability.
Complete hypothetical examples
Mode 1 example
Current price €80.00, planned increase 12.5%.
- Increase amount = 80.00 × 0.125 = €10.00
- New price = 80.00 + 10.00 = €90.00
Mode 2 reverse check
Old price €80.00, new price €90.00.
- Change amount = 90.00 − 80.00 = €10.00
- Change % = (10.00 ÷ 80.00) × 100 = 12.50%
Both modes agree on this hypothetical case. Figures are educational, not a live customer price list.
Revenue and unit-contribution scenario (hypothetical)
Continue with unit variable cost €50.00 and 1,000 units. Cost and volume are held constant only as explicit arithmetic assumptions—not as a demand forecast.
- Before: revenue = €80,000; unit contribution = €30.00; total contribution = €30,000; contribution margin = 37.50%
- After at unchanged volume: revenue = €90,000; unit contribution = €40.00; total contribution = €40,000; contribution margin = 44.44%
- Volume needed to preserve the original €30,000 total contribution at €40.00 unit contribution: 750 units
The 750-unit figure is an arithmetic threshold only. Customer demand response is not predicted by the calculator.
How to use the result in a pricing review
- Confirm the old or current price, effective date, currency, tax basis, and standard discounts.
- Run Mode 1 or Mode 2 in the live calculator, then reverse-check with the other mode when both prices are known.
- Recalculate unit contribution using current variable costs and channel fees on the same tax basis. If you intend to calculate accounting gross profit instead, use consistently defined cost of goods sold and exclude costs classified below gross profit.
- Test volume scenarios rather than assuming demand stays unchanged.
- Record approvals, contract exceptions, and the date actual results will be reviewed.
Limitations
- Demand: no elasticity, churn, or competitor-response forecast.
- Profit: a higher price does not guarantee higher total profit when volume, discounts, returns, commissions, or costs change.
- Contracts: notice periods, indexation, caps, and open orders may restrict implementation.
- VAT / sales tax: keep one consistent basis; the tool does not compute tax.
- Currency and rounding: calculate each currency separately; apply channel or list rounding only after the arithmetic.
- Data timing: stale costs or price lists can make a correct calculation operationally wrong.
Run and document the scenario
Use the calculator for price-change arithmetic, then test margin and volume assumptions before approval.
FAQ
What are the two modes in the calculator?
Mode 1 applies Current Price + Increase % to produce New Price. Mode 2 uses Old Price + New Price to produce the change amount and Increase %.
How is a price increase percentage calculated?
In Mode 2: (New price − Old price) ÷ Old price × 100. The old price must be greater than zero.
Can the calculator predict how many units customers will buy?
No. It calculates a price or percentage change only. Demand response must be estimated separately.
Should prices be entered with or without VAT?
For business analysis, prefer tax-exclusive values when VAT or sales tax is collected, remitted, or recoverable, and keep the same treatment on every compared price. Tax-inclusive cash comparisons must be labeled; do not mix bases.
Does a price increase guarantee more profit?
No. Unit contribution can rise while total gross profit falls if volume drops enough or costs increase.
Can Mode 2 show a decrease?
Yes. When the new price is lower than the old price, the change is negative and the tool indicates a price decrease.