Calculate US Treasury Bill discount rate, investment yield, and returns. Safe, government-backed investments.
Calculate T-Bill yields and returns.
Analyze risk-free investments with the Treasury Bill Calculator. T-Bills are backed by the full faith and credit of the US government, making them one of the safest investments available.
Treasury Bills are short-term government securities sold at a discount. You pay less than face value and receive the full face value at maturity—the difference is your return. With current yields around 4-5%, T-Bills are competitive with savings accounts while being state and local tax-exempt.
Investment yield is more accurate for comparing to other investments.
$10,000 face value 13-week T-Bill purchased for $9,875: Discount = $125. Discount rate = 4.95%. Investment yield = 5.07%. Annual return on $9,875 = ~$506.
| Maturity | Rate Range |
|---|---|
| 4-week | 4.5% - 5.5% |
| 13-week | 4.7% - 5.3% |
| 26-week | 4.5% - 5.2% |
| 52-week | 4.3% - 5.0% |
Related tools: Bond Calculator for longer-term securities, Tax Equivalent Yield Calculator for tax comparisons, and Investment Calculator for portfolio planning.
Discount Rate = (Discount ÷ Face) × (360 ÷ Days). Investment Yield = (Discount ÷ Price) × (365 ÷ Days). Investment yield is more accurate for comparisons.
Yes for safety and short-term parking. Zero default risk, state/local tax-exempt, currently 4-5% yields. Best for emergency funds and short-term goals.
Buy directly at TreasuryDirect.gov (no fees) or through brokers. Minimum $100. Auctions for 4, 8, 13, 17, 26, and 52-week terms. Auto-roll feature available.