Greek tax deadline approaches: 1.4 million taxpayers still to file, average extra tax at €1,866

Filing progress

More than 5.55 million tax declarations for 2025 income have been submitted out of an estimated 6.9 million, meaning about 80% of taxpayers have already filed. The remaining 1.4 million have until July 15, 2026 to submit their returns or amend any errors without penalty.

Tax burden and refunds

Of the declarations processed so far, 33.81% are chargeable, with total additional tax assessed exceeding €3.5 billion. The average extra tax per affected taxpayer is €1,866, though one report cites €1,886. Another 30.49% of filings are credit cases, generating refunds totalling €514.5 million, or an average of €304 per recipient. The remaining 35.7% are zero-balance declarations with no further payment or refund.

Chargeable (extra tax)33.81%

Credit (refund)30.49%

Zero balance35.7%

Chargeable (extra tax)

33.81 %

Credit (refund)

30.49 %

Zero balance

35.7 %

Data from the article text

Payment deadlines and discounts

Taxpayers with a debit balance must begin payment by July 31, 2026, either via the first of eight monthly instalments or as a lump sum. A discount applies for one-off payment: 4% if the initial declaration was submitted by May 15, 3% if between May 16 and June 15, and 2% for filings completed by the July 15 deadline.

Correcting errors penalty-free

Amended declarations can be filed without any fine until July 15. The system automatically carries over data from the original forms, so taxpayers only adjust the specific fields that need correction. The new assessment replaces the original, and in many cases the revised calculation can lower the tax due or increase a refund.