What is VAT withholding, and how is it calculated?

You receive a service invoice; it carries a note like "VAT withholding 7/10," and you are told to pay the seller less than the invoice total. This is not an error; it is VAT withholding (in Turkey, KDV tevkifatı). Withholding means that for certain goods and services, part of the VAT is withheld by the buyer instead of the seller and paid directly to the tax office. The logic is simple but confusing on first encounter. This article explains what withholding is, why it exists, how it appears on an invoice, and who declares what.

What is VAT withholding?

In a normal sale, the seller adds VAT, collects it from the buyer, and remits it to the state via their return. Withholding splits this flow: instead of paying a certain share of the VAT to the seller, the buyer withholds it and pays it directly to the tax office via their own return, paying the remainder to the seller. Responsibility is shared. The core purpose is to reduce VAT that goes unrecorded or uncollected — the state secures part of the tax "at source," through the buyer.

Partial vs. full withholding

There are two basic forms. In partial withholding, only a fraction of the VAT is withheld by the buyer; the seller collects the rest. This ratio varies by transaction type and is usually expressed as a fraction such as 2/10, 5/10, 7/10 or 9/10 — i.e., "what share of the calculated VAT the buyer withholds." In full withholding, the entire VAT is withheld by the buyer and no VAT is paid to the seller. Which transaction is subject to which ratio, or to full withholding, is set by the tax authority's regulations; scope and ratios are updated from time to time, so you should confirm the current list with the authority's rules or your accountant.

How it appears on an invoice (the logic)

A withholding invoice has one extra step compared with a normal one. First the net amount of the goods/service is stated, then VAT is calculated on it at the relevant rate. Next, the withheld fraction of that VAT is computed and shown separately as withheld VAT. Two important figures appear: the amount the seller will collect (net amount + non-withheld VAT) and the withheld VAT the buyer will pay to the tax office. So the buyer pays the seller this net figure — not the gross invoice total — and pays the difference directly to the state. Doing this split by hand invites ratio errors, which is why it is critical that the software issuing the invoice calculates withholding automatically.

Who declares what?

This is the most misunderstood part. The seller declares only the portion of the invoice VAT that remains with them (the non-withheld part) via their normal VAT return. The buyer declares and pays the VAT they withheld through a separate return filed in the capacity of "responsible party" (in Turkey, the No. 2 VAT return). Thus the VAT on a single invoice is shared between the two parties. In many cases the buyer can also deduct the VAT they withheld and paid; but this depends on the nature of the transaction and requires the accounting entry to be set up correctly.

A practical way to manage withholding

Withholding is not conceptually hard, but it is operationally error-prone: the wrong ratio, the wrong net amount, or confusion on the return. The way to make it reliable is to bring invoicing and return preparation into one pre-accounting flow. In a good system you pick the withholding ratio; the software computes the VAT, the withheld amount and the net payable to the seller, issues the invoice in the correct format, and keeps the split ready for the return. We cover invoicing in general — issuing, sending, document type — in our invoicing guide, and choosing the right document type in e-Invoice vs e-Archive.

Quick summary

VAT withholding means that, for certain transactions, part (partial) or all (full) of the VAT is withheld by the buyer instead of the seller and paid directly to the tax office. The purpose is to reduce tax loss at source. The withheld VAT is shown separately on the invoice; the seller declares the part that stays with them, and the buyer declares the part they withheld, via separate returns. Because ratios and scope are set by regulation and change, confirming the current rule is essential — while in daily practice, leaving the calculation to your software is the safest path.