US Treasury Series I Savings Bond Composite Rate & Interest Calculator
Calculate your semiannual and annual interest yield on US Treasury Series I Savings Bonds using the Treasury composite formula combining fixed rate and semiannual inflation rate (CPI-U).
Datos y Parámetros
En tiempo realTotal Annualized I-Bond Composite Rate (%)
Annual Guaranteed Interest Earned ($/yr)
502 %
3-Month Interest Penalty (if redeemed before 5 years)
125.5 %
Desglose Detallado del Cálculo
Metodología de Cálculo
Composite Rate = Fixed Rate + (2 * Semiannual Inflation Rate) + (Fixed Rate * Semiannual Inflation Rate). Annual Interest = Principal * (Composite Rate% / 100).
Aviso Legal e Informativo
I-Bonds must be held for a minimum of 1 year. If redeemed before 5 years, you forfeit the previous 3 months of interest. Annual purchase limit is $10,000 per SSN per calendar year.
Esta calculadora es para fines educativos e informativos. Los resultados no constituyen asesoramiento financiero, fiscal o legal vinculante.
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