METHOD & GUIDANCE
How this calculation works
Enter figures from the same period and on a consistent sales tax-inclusive or sales tax-exclusive basis. Tool IQ recalculates every output immediately; nothing you enter is saved or sent to us.
How to use the result
Measure periods of equal length, then check whether margin, cash and customer retention support the headline growth rate.
Worked example
Moving from 80,000 to 100,000 is a 20,000 absolute increase and 25% growth.
Common mistakes
- Comparing periods of different length.
- Ignoring acquisitions, currency or one-off revenue.
- Assuming the same percentage growth continues indefinitely.
Frequently asked questions
Is this calculator free?
Yes. It requires no account and stores no calculation inputs.
Can I use the answer for a formal filing?
No. It is a planning estimate, not accounting, tax, legal or investment advice. Confirm material decisions with a qualified professional.
Should I include sales tax?
Use a consistent basis throughout. Businesses that recover input tax commonly model net figures; consumer-facing prices are often considered gross.
Continue the decision
- ROI Calculator — Compare return, profit and payback at a glance.
- Cash Runway Calculator — Estimate how many months your available cash will last.
Method reviewed 26 July 2026. Figures are illustrative and calculated locally in your browser.