VAT Calculator

Where VAT calculation comes in handy

The most common case is checking somebody else's invoice. A counterparty sent a document with a line reading including VAT, and you need to know how much of the amount is tax and how much is the price of the goods. A bookkeeper faces the same problem during reconciliation: the invoice total and the declared total do not match, and the only way to find out where the error sits is to split the total into base and tax.

The second case is pricing. When you issue an invoice and your price list quotes prices without tax, the tax is added on top and the customer pays more than the list says. Doing that by hand across dozens of line items is awkward, especially with several rates in play. The third case is marketplaces and agency networks, where the tax is taken out of the order value and passed to the platform: sellers benefit from knowing in advance how much will be withheld and how much will actually land. The fourth is checking older documents, where the rate in force was 20 % through 2025 or 18 % before that.

• Checking a counterparty's invoice: how much tax is baked into the total
• Issuing an invoice to a client: a price without tax plus tax on top
• Reconciling a calculation against a tax declaration
• Working out a marketplace payout: what is withheld, what arrives
• Checking documents from 2024–2025 at the 20 % and 18 % rates
• A quick sanity check before an invoice goes out the door

Typical mistakes in VAT arithmetic

The first and most common mistake is swapping on top and inside. Someone sees 113,000 ₽ on an invoice and divides by 1.13 out of habit, and gets a random number instead of the base, because 1.13 applies only to a total with VAT and never to the tax on its own. The second mistake is taking a percentage of the total: 113,000 ₽ × 13 % gives 14,690 ₽, while the invoice carries 13,000 ₽, because the rate is calculated from the base and not from the final amount.

The third mistake is confusing the income tax scale with the VAT scale: hearing 13 % or 15 %, someone puts that rate on an invoice even though the standard VAT rate for 2026 is 22 % and 13 / 15 / 18 / 20 % belong to personal income tax. The fourth is forgetting rounding, where the tax was computed at full precision, the kopecks were dropped from the invoice and the declaration ends up with a figure that does not match. All three arithmetic operations are worth checking separately, and the percentage calculator is the right place to do that.

• Dividing the tax by 1.13 instead of dividing the total by 1.13
• A percentage taken from the total rather than from the base
• An income tax rate used on an invoice as if it were a VAT rate
• Rounding the tax upwards without recording it in the declaration
• The special 5 % or 7 % rate where the ordinary 22 % with deductions was meant
• A 20 % rate on a 2026 invoice, or a 22 % rate on a 2025 one

A worked example, step by step

Take the numbers that come up most often: a price of 100,000 ₽ without tax at 22 %. First charge the tax on top: 100,000 × 22 / 100 = 22,000 ₽, and the total with VAT is 122,000 ₽. Now read the same invoice the other way round and extract the tax from 122,000 ₽: 122,000 × 22 / 122 = 22,000 ₽, and the base is 122,000 − 22,000 = 100,000 ₽. Both roads lead to the same tax, and that is the best possible check on an invoice.

Working backwards differs only in how it is written: base = 122,000 × 100 / 122 = 100,000 ₽, tax = 122,000 − 100,000 = 22,000 ₽. That notation is what tax practice calls the calculated rate 22/122. Everything the calculator puts on screen comes out of these three formulas, so the result can be verified by hand on any amount.

Amounts are rounded to kopecks once, at the end: the base plus the tax always adds back up to the original total.

VAT next to the other calculations

VAT is rarely calculated on its own. Turnover, salary and the threshold at which a taxpayer's status changes sit right next to it, and that is where two different taxes get mixed up. There is a full breakdown of the rates, the thresholds and the income tax scale in the article on VAT explained simply. When the invoice has to be written out in words for a contract or a waybill, the amount in words tool takes the figure as it stands.

And if what you are actually working on is future turnover rather than an invoice, with an interest in the month when income crosses the 20 million ₽ threshold, the compound interest calculator shows how sums grow with monthly contributions. Ordinary percentage questions, such as what 13 % of an amount is or by how much one number exceeds another, belong to the percentage calculator.

• VAT and income tax: two scales that share only the 22 % rate
• The 20 million ₽ threshold: below it a simplified taxpayer is exempt
• Deductions reduce the tax, not the base
• Rounding to kopecks decides whether an invoice reconciles
• The calculated rate 22/122 is a way of extracting tax, not a separate rate
• The rate for a deduction is always the one printed on the invoice