SMM Calculation for Freelancers: How Are Withholding Tax and VAT Calculated?
For self-employed consultants, designers, software developers and lawyers, the same question comes up every month: on the self-employment receipt you issue, how much will you collect from the client, how much will be deducted as withholding tax and how much will you actually receive net? In this article we explain the VAT and withholding tax components of the SMM step by step, with examples.
🚀 At a Glance
The withholding tax rate is 20% and is calculated on the self-employment income excluding VAT.
The VAT rate is generally 20% and is added to the service fee and collected from the client.
Net collection is found with the formula gross service fee + VAT − withholding tax. The withholding tax deducted is offset against the tax payable on your annual income tax return — so it is not money lost but tax paid in advance.
You don't have to do this calculation by hand: with the Üstad SMM Calculator you can see your withholding tax, VAT and net collection in seconds.
What Is an SMM?
A self-employment receipt (SMM) is the official document that self-employed people (lawyers, accountants, consultants, architects, software developers, etc.) must issue for the services they provide. It should not be confused with an invoice: an SMM is a special document on which both VAT and withholding tax are calculated on the income, showing two different tax items together.
Which Taxes Are Calculated on an SMM?
1. Withholding Tax (Income Tax Deduction)
Withholding tax is the income tax deduction that your client (as the party responsible for the tax) pays to the state in advance on your self-employment income.
Rate: 20% (calculated on the service fee excluding VAT)
Who pays: The party receiving the service pays this amount directly to the tax office on your behalf.
What happens: On the income tax return you file at the end of the year, these deductions are subtracted from the tax you owe for that year.
💡 Üstad Reminder: Think of the withholding tax deduction not as money you lose but as tax paid in advance. You can track your monthly and annual withholding tax with Üstad.
2. VAT (Value Added Tax)
VAT is the tax added to the fee for your service and collected from the client, which you then declare and pay to the state.
Rate: 20% for most self-employment services (different rates may apply depending on the type of service, so we recommend confirming the rate for your line of business with your accountant).
Who pays: The client pays you the VAT added to the service fee; you then declare and pay it to the state on your monthly VAT return.
Step-by-Step Calculation
In the example below we calculate on a service fee (tax base) of 10,000 TL:
Step 1 — Determine the service fee (tax base): Tax base = 10,000 TL
Step 2 — Calculate VAT: VAT (20%) = 10,000 × 0.20 = 2,000 TL
Step 3 — Calculate withholding tax: Withholding tax (20%) = 10,000 × 0.20 = 2,000 TL (Withholding tax is calculated on the tax base before VAT is added.)
Step 4 — Find the total amount to collect from the client: Total Collection = Tax base + VAT = 10,000 + 2,000 = 12,000 TL
Step 5 — Calculate the net amount received: Net Collection = Total Collection − Withholding tax = 12,000 − 2,000 = 10,000 TL
💡 Üstad Reminder: In this example it is no coincidence that the net collection equals the tax base — because VAT and withholding tax are calculated at the same rate (20%), they cancel each other out. However, it will not always look this "round"; for services subject to VAT at different rates, the net collection will differ from the tax base.
Calculate in Seconds with the Üstad SMM Calculator
Applying the steps above one by one for every receipt takes time, and a small rate or rounding error can lead to an incorrectly issued receipt. Üstad's free SMM calculator does the work for you:
Choose the calculation direction based on the amount you have: gross (excluding or including VAT) or net (excluding VAT or net collection).
Enter the amount, the withholding tax rate (20%, 17% or 0%) and the VAT rate (20%, 10%, 1% or 0%).
Click "Calculate" and the withholding tax, VAT and amount to collect appear on screen instantly.
If your client says "I'll pay this much net", choose the Net direction to work back to the gross amount you need to put on the receipt.
💡 Üstad Reminder: The tool is for information only and gives approximate results. Confirm the final calculation and the receipt layout with your accountant.
Common Mistakes
Calculating withholding tax on the amount including VAT. Withholding tax must always be calculated on the tax base excluding VAT.
Confusing net collection with "the earnings you keep". Net collection is the amount before you pay VAT to the state; you still need to declare and pay the VAT separately.
Treating withholding tax as an expense. Withholding tax is not a loss; it is income tax paid in advance and is offset on the annual return.
Assuming a fixed 20% VAT rate without checking. Depending on your type of business, an exemption or a different rate may apply; confirm this with your accountant.
Conclusion: What Should You Do?
For each SMM, calculate the tax base, VAT and withholding tax separately and show them clearly on the receipt.
Keep a regular record of the withholding tax deducted; you need these amounts so you can offset them when preparing your annual return.
File your monthly VAT return on time and keep the VAT you collect in a separate account so it does not disrupt your cash flow.
If some of your services may be subject to VAT at different rates, confirm the rate in advance.
To avoid calculation errors when issuing a receipt, use the Üstad SMM Calculator.
Frequently Asked Questions
Is the withholding tax rate always 20%?
The general withholding tax rate on self-employment income is 20%; apart from some exceptional cases, this rate is fixed.
Where can I do an SMM calculation?
In Üstad's free SMM calculator, you can enter the amount, withholding tax rate and VAT rate to see your net collection instantly.
Do I get the withholding tax deduction back?
It is not refunded directly; the withholding tax deducted is offset against the tax calculated on your annual income tax return.
Are net collection and net earnings the same thing?
No. Net collection is the amount you receive after withholding tax is deducted; it is the amount before you pay VAT to the state and before expenses are subtracted — your real net earnings emerge after expenses and the annual tax calculation.
When do I pay VAT to the state?
You declare and pay the VAT you collect on the VAT return for the month of the activity, by the set date in the following month.
