Turkey Self-Employment Provisional Tax 2026: Four Periods and Withholding Credits

Regulatory review date: 11 September 2026. This guide covers a resident individual in Turkey’s general self-employment regime. Copyright income under Article 18, social-content income under repeated Article 20/B, occasional earnings, notarial income, non-residence and foreign tax credits require separate analysis.

Short answer

Turkey’s self-employment provisional tax is calculated at 15% for four cumulative periods in 2026. But “net earnings × 15% = provisional tax necessarily paid” is incomplete: withholding on the related professional earnings is also credited in the period calculation.

The correct sequence is:

1. determine cumulative self-employment earnings;
2. apply 15% to find provisional tax calculated;
3. deduct provisional tax actually paid in earlier periods;
4. deduct related withholding for the accounting period;
5. pay any balance by the deadline;
6. on the annual return, report only provisional tax actually paid and report all related withholding on their separate lines.

That sequence prevents the same theoretical provisional-tax amount from being credited twice.

1. Why is the rate 15%?

Repeated Article 120 of the Income Tax Law applies the rate of the first income-tax bracket to self-employment earnings. General Communiqué No. 332 sets the first 2026 bracket rate at 15%, so the provisional-tax rate is also 15%.

Annual income tax is different. The 2026 non-employment tariff progresses through 15%, 20%, 27%, 35% and 40%. Provisional tax is therefore an advance calculation, not the final annual liability.

The base is not turnover. It is generally professional collections less expenses paid and allowed under Article 68. Social-security contributions, the young-entrepreneur exemption and other deductions require a separate line-by-line check.

2. There are four periods, not three

Law No. 7338 had removed the fourth provisional-tax period. Law No. 7566 later removed the “first nine months” limitation from repeated Article 120. The Revenue Administration’s 2026 guide confirms that the fourth period applies again from the 2025 calendar year.

For a calendar-year professional, the cumulative periods and statutory deadlines are:

2026 calendar point: 17 May 2026 fell on a Sunday, so the Revenue Administration calendar set 18 May 2026 as the actual deadline for the first period. The second-period deadline was 17 August 2026. Check the official calendar for any extension or holiday adjustment before the third and fourth filings.

Filing and payment are due on the same statutory day. The old formulation “file on the 17th and pay by month-end” is not the current general rule.

3. Who withholds and what document is issued?

A self-employed professional generally issues an electronic self-employment receipt (e-SMM) for a professional collection, not an invoice.

A payer that is a withholding agent under Article 94 generally withholds 20% on an ordinary professional fee. Article 18 copyright work carries a 17% rate and its exemption/finality analysis is separate. The withholding base and supporting document should be checked transaction by transaction.

Not every collection is automatically subject to withholding. A final consumer without a withholding obligation does not deduct income-tax withholding, while commercial companies and other withholding agents listed in Article 94 generally do so on ordinary professional payments.

4. How is withholding credited in the period return?

The Revenue Administration’s 2026 guide gives the order: deduct provisional tax previously paid for the accounting period and withholding related to the earnings subject to provisional tax. The remainder is provisional tax payable for the current period.

A simplified formula is:

Period provisional tax payable = cumulative earnings × 15% − prior provisional tax actually paid − related cumulative withholding

If the result is below zero, no negative provisional tax is paid for the period. Do not confuse excess withholding in the period calculation with the annual refund procedure.

5. How does the annual return avoid a double credit?

Annual income tax is calculated under the 2026 progressive tariff. The return then distinguishes two advance-tax items:

• Provisional-tax line: the sum of the “provisional tax payable” amounts under period returns that were actually paid;
• Tax withheld line: all withholding for the year, including withholding used in provisional-tax calculations.

Entering the theoretical “earnings × 15%” amount as if it had been paid, and then also deducting all withholding, is incorrect. That was the error in the previous example on this page.

6. Corrected TRY 3,000,000 example

Assumptions:

• gross professional collections excluding VAT: TRY 3,000,000;
• expenses allowed under Article 68: TRY 800,000;
• self-employment earnings / illustrative tax base: TRY 2,200,000;
• all collections are subject to ordinary 20% withholding;
• no other deduction, loss or credit affects the result.

The old calculation treated the theoretical TRY 330,000 provisional tax as paid and separately deducted TRY 600,000 withholding, producing a TRY 277,500 refund. It overstated the credit by TRY 330,000.

The actual outcome can change with the timing of collections and expenses, losses carried within the year, other income, deductions, the 5% compliant-taxpayer reduction and withholding evidence. This table is limited to explaining the mechanism.

7. What changes with clients that do not withhold?

With the same TRY 2,200,000 earnings and no withholding, the TRY 330,000 provisional tax would ordinarily be paid through the four periods. Annual tax would be TRY 652,500, leaving approximately TRY 322,500 payable on the annual return before other credits and deductions.

A professional cash-flow file should therefore track at least:

1. collections excluding VAT;
2. expenses paid and allowed under Article 68;
3. withholding deducted and the withholding agent;
4. provisional tax assessed and actually paid in earlier periods.

8. A refund is not automatic

Withholding or provisional tax actually paid may exceed annual income tax and create a refund claim. But there is no reliable basis for a blanket claim that most professionals subject to withholding receive refunds.

The withholding must relate to income included in the annual return. Offset and cash-refund claims are subject to the evidence and electronic-application rules in General Communiqué No. 252 and are processed through the Digital Tax Office.

Frequent errors

1. continuing to state that there are three periods in 2026;
2. postponing payment from the 17th to month-end;
3. calling the professional receipt an invoice;
4. assuming every customer automatically withholds 20%;
5. omitting withholding from the provisional-tax calculation;
6. treating theoretical 15% provisional tax as paid and creating a double annual credit;
7. crediting assessed but unpaid provisional tax on the annual return;
8. promising a refund before checking scope and evidence.

Implementation checklist

1. Confirm that the earnings fall within the general self-employment regime.
2. Close e-SMM, bank and bookkeeping records for each quarterly period.
3. Reconcile cumulative collections and Article 68 expenses paid.
4. Apply 15% to cumulative earnings.
5. Verify prior provisional tax actually paid and related withholding separately.
6. File and pay any balance by the current Revenue Administration deadline.
7. Reconcile withholding agents and annual withholding before the annual return.
8. Enter only provisional tax actually paid and all withholding in the correct annual-return lines.

Special situations such as mixed customer portfolios, Article 18/20-B income, foreign collections and refunds require a period-level model. Review the broader SME tax guide or contact us for a scoped analysis.

Official sources

• Revenue Administration — 2026 self-employment earnings tax guide
• Revenue Administration — 2026 income tax tariff
• Revenue Administration — filing and payment deadlines
• Revenue Administration — 2026 tax calendar
• Revenue Administration — Income Tax General Communiqué No. 332
• Grand National Assembly — Law No. 7566
• Legislation Information System — Income Tax Law