A NEW ERA IN LEGAL INTEREST:
FIXED RATES REPLACED BY A DYNAMIC SYSTEM
31 July, 2026, Friday
For years, fixed legal interest rates failed to keep pace with inflation, eroding creditors' property rights and effectively turning delayed payments into low-cost financing for debtors. This landmark shift comes in response to the Constitutional Court’s ruling that static rates violated property rights, leading to fundamental amendments to Law No. 3095 on Legal Interest and Default Interest.
Why Was the Law Changed? Under the previous framework, fixed annual interest rates (previously 9% and later adjusted) fell significantly short of prevailing inflation and market rates. This systemic gap encouraged debtors to artificially prolong litigation and enforcement proceedings to benefit from eroded claims, causing severe financial losses for creditors. Finding this practice unconstitutional, the Constitutional Court annulled the fixed-rate statutory mechanism.
How Does the New Dynamic System Work? The new regime abandons arbitrary administrative caps in favor of a market-indexed, objective mechanism:
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CBRT Redistribution/Rediscount Index: Unless otherwise agreed by contract, the statutory interest rate is automatically calculated as 80% of the Central Bank of the Republic of Türkiye (CBRT) short-term rediscount rate as of December 31 of the preceding year.
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Semi-Annual Adjustments: To reflect market realities, the rate is structured to be re-evaluated and updated twice a year based on economic fluctuations.
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Removal of Discretionary Caps: Executive discretion in setting static interest rates has been removed, anchoring the mechanism to clear, market-based mathematical criteria.
Impact on Ongoing Litigation and Enforcement Files Interest calculations will follow a period-by-period (staggered) approach:
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Prior Periods: Accrued interest prior to the enactment date of the new regulation will be calculated using the former statutory rates valid during those respective periods.
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Future Periods: From the effective date onward, interest accruals will automatically adopt the newly updated dynamic rates.
Implications for Commercial Contracts and Default Interest This adjustment directly impacts the maximum statutory caps for contractual and default interest permissible under the Turkish Code of Obligations. Businesses and legal practitioners should carefully review existing commercial contracts, loan agreements, and dispute clauses to ensure alignment with the updated legal thresholds.
Conclusion The new dynamic statutory interest system aims to preserve the real value of monetary claims against inflation while discouraging delayed debt settlements as a tactical maneuver in legal disputes. To avoid loss of rights and ensure precise interest calculations in commercial or civil proceedings, seeking specialized legal counsel is strongly advised.