# Greek banking sector impact from Katseli law ruling

> Live situation record from CLSTR: https://clstr.news/situations/greek-banking-sector-impact-from-katseli-law-ruling
> Updated: 2026-09-03T04:42:08.000Z. Sources: 4. Developments: 3.

A Supreme Court ruling regarding the Katseli law has imposed significant financial burdens on Greece’s systemic banks. The decision changes how interest is calculated for active loan restructurings under protection, requiring interest to be applied only to the monthly installment and the period between payments, rather than the total outstanding principal.

Banks are required to set aside more than €60 million in provisions to account for this change, a figure already reflected in second-quarter financial results. The impact extends to securitized portfolios, where banks may be required to refund excess interest to the ‘Hercules’ state-guarantee scheme to cover obligations created by the decision. This shift is expected to reduce future cash-flow recoveries and, in some cases, shorten loan repayment periods.

For the borrowers themselves, the ruling is expected to significantly reduce monthly payments. Under the new method, interest applies to the installment amount rather than the full outstanding debt. For instance, a €100,000 loan with a 4.5% interest rate could see monthly installments drop from €616 to €417. Debt servicers are expected to issue new repayment schedules to thousands of eligible borrowers by the end of the year, providing financial relief amid rising housing and rental costs.

## Timeline

### 2026-09-03: Greece: Katseli Law borrowers to receive lower monthly installments

Greek borrowers under the Katseli Law will see reduced monthly installments following a Supreme Court ruling that changes how interest is calculated on restructured debts.

2 sources. https://clstr.news/cluster/greece-katseli-law-borrowers-to-receive-lower-monthly-installments

### 2026-08-18: Greek banks face 60 million euro burden from Supreme Court ruling

Greek banks must record over 60 million euros in provisions following a Supreme Court ruling that changes interest rate calculations for loans under the Katseli Law.

2 sources. https://clstr.news/cluster/greek-banks-face-60-million-euro-burden-from-supreme-court-ruling

### 2026-08-08: Greek Katseli law adds €55.5 million cost to major banks

Greece's Katseli law retroactively alters loan interest calculation, costing the four systemic banks €55.5 million in Q2 and shifting excess interest to the state‑guarantee “Heracles”.

2 sources. https://clstr.news/cluster/greek-katseli-law-adds-555-million-cost-to-major-banks

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Cite as: Greek banking sector impact from Katseli law ruling. CLSTR, https://clstr.news/situations/greek-banking-sector-impact-from-katseli-law-ruling