Cash Flow Calculator
Cash Flow Calculator helps you estimate the main outcome for United Kingdom using Monthly Revenue (£), Cost of Goods Sold (£), and Operating Expenses (£). Use it to compare scenarios before making a final decision.
Rates & sources
UK company rates (Corporation Tax, VAT, payroll NI) as published by HMRC and Companies House.
Source: HMRC — Running a business — figures refreshed at the start of each tax year.
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When to use this calculator
- Before pricing a job, setting margin targets, or reviewing hiring costs.
- When you want to test sensitivity around volume, VAT, markup, or overhead changes.
- When you need a practical estimate before committing to a budget or proposal.
A realistic UK planning example
Use these sample inputs as a quick scenario test, then change one variable at a time to compare outcomes.
Monthly Revenue (£)
6
Cost of Goods Sold (£)
£500
Operating Expenses (£)
5000
Tax Rate (%)
5%
After entering these figures, focus on result first and then rerun the tool with a more cautious assumption.
How to read your results
Result
Use this metric to compare scenarios side by side and understand how the key drivers affect the final outcome.
Common mistakes
- !Using optimistic assumptions without testing a more cautious scenario as well.
- !Comparing outputs from different tools without checking that the inputs match.
- !Treating the result as a final quote instead of a planning estimate.
What to do next
- Try at least one more scenario so you can compare a realistic range instead of a single estimate.
- Use the related calculators below to cross-check the decision from another angle.
- Open one of the linked guides if you need more context before you act on the result.
Frequently asked
Use arrow keys to navigate items, Enter or Space to expand/collapse.