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Quarterly VAT Estimator

Estimate VAT due for a period using net sales, net purchases and a VAT rate. Useful for a quick VAT return forecast.

Use this calculator when you need a fast, reliable answer without opening a spreadsheet. Enter your figures below and press Calculate. PercentNinja shows the key outputs you typically need for pricing decisions, VAT checks, ecommerce payouts or ad reporting.

When to use this

Calculate

Results are estimates for informational purposes only and may be rounded.
Tip: Press Enter to calculate.

Worked examples

Example 1

Question: Sales £20,000, purchases £6,000, rate 20%.

  • Output VAT = 20,000×0.20 = £4,000
  • Input VAT = 6,000×0.20 = £1,200
  • Due = 4,000 − 1,200 = £2,800

Example 2

Question: Sales £8,000, purchases £9,000, rate 20%.

  • Output VAT = £1,600
  • Input VAT = £1,800
  • Due = −£200 (repayment)