How compound interest works
Future value ≈ principal × (1 + periodic rate)^periods. Contributions each period also earn subsequent interest.
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Data updated: 2026-08-12
Content updated: 2026-10-22
Sources
- Gelir İdaresi Başkanlığı
- SGK
- Çalışma ve Sosyal Güvenlik Bakanlığı
- EPDK
- Mevzuat Bilgi Sistemi
- CSGB / Asgari Ücret Tespit Komisyonu (2026 brüt/net)
- GİB gelir vergisi tarifesi 2026
- EPDK mesken elektrik kademeli tarife (yaklaşık)
- BOTAŞ / dağıtım şirketleri doğalgaz (yaklaşık)
- Hazine ve Maliye — kıdem tazminatı tavanı 1. dönem 2026
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How is it calculated?
A = P (1 + r/n)^(n·t)
A = P (1 + r/n)^(n t)
Official sources
Example
10,000 at 12% for 5 years, monthly compounding.
Guide
Model compound growth of a principal over time, with optional regular contributions. Not a guaranteed return—fees and taxes may apply.
2026 context and common mistakes
Inflation and fees reduce real growth. Mismatching annual rates with monthly compounding periods is a classic error.
Tips
- Align rate period with compounding frequency.
- Guidance only—not investment advice.
Sources: Basic finance maths · Investor education materials
FAQ
Difference from simple interest? +
Compound interest earns interest on interest.