What This Calculator Estimates
This VAT reverse calculator estimates the net amount before VAT when you start with a gross VAT-inclusive price. It also shows the VAT portion extracted from that total.
Formula / Method Used
- Net amount = Gross amount / (1 + VAT rate)
- VAT amount = Gross amount - Net amount
Worked Example
If the gross amount is 120.00 and the VAT rate is 20%, the estimated net amount is 100.00 and the extracted VAT is 20.00.
What the Result Means
The main result is the estimated net amount before VAT. The detail line shows how much VAT was contained within the gross amount you entered.
Common Mistakes
- Entering a net amount even though this page expects a gross amount.
- Using the wrong VAT rate for the transaction.
- Assuming every item in a mixed invoice uses the same VAT treatment.
- Ignoring rounding differences between line-item and invoice-level VAT.
Official References
Verify current rates with the official tax authority source that applies to the transaction before using the result for filing or invoicing.
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Frequently Asked Questions
What does this VAT reverse calculator estimate?
It estimates the net amount before VAT by removing VAT from a gross amount using the VAT rate you enter.
When is a reverse VAT calculation useful?
It is useful when you know the VAT-inclusive total and need to estimate the net amount and VAT portion.
Does it work for any VAT rate?
Yes, as long as you enter the correct VAT rate for the transaction you are checking.
Why can the extracted VAT differ from an invoice?
Invoice rounding, discounts, item-specific rules, and local tax treatment can make the final VAT amount differ.
Where should I verify the rate and treatment?
Verify current rates with the official tax authority source that applies to the transaction before using the result for filing or invoicing.
General Disclaimer
This calculator provides VAT estimates only and is not tax, legal, or accounting advice. Final VAT treatment depends on current rules, item category, and invoice structure.
Last updated: May 22, 2026