T-Bill Reinvestment Calculator
Roll T-bills over several cycles and see total profit.
Your T-bill numbers never leave your browser — all math runs locally.Try: Face value=1000, Purchase price=980, Days to maturity=182, Reinvest cycles=4 → $20, 4, $80, $1,060, 1.99, 0.0409%
How to use
Each cycle earns the discount; rolling reinvests the proceeds. The calculator totals profit and the blended annual return.
FAQ
What is reinvestment risk?
If rates fall, each rollover may earn less — a ladder reduces that risk.
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