TIPS Calculator (Treasury Inflation-Protected)
Calculate TIPS real return and inflation-adjusted principal. Compare to nominal Treasury bonds.
Total Value at Maturity
$15,749.01
Adjusted Principal
$13,439.16
Total Coupon Income
$2,309.84
TIPS Return Summary
| Original Principal | $10,000.00 |
| Inflation-Adjusted Principal (10 yr) | $13,439.16 |
| Principal Appreciation | $3,439.16 |
| Total Coupon Payments | $2,309.84 |
| Total Return | $5,749.01 |
| Annualized Nominal Return | 4.65% |
| Annualized Real Return | 2.00% |
TIPS vs Nominal Treasury
| Nominal Treasury Yield (est.) | 5.00% |
| Nominal Treasury Total | $15,000.00 |
| Nominal Real Value (after inflation) | $11,161.41 |
| TIPS Total Value | $15,749.01 |
| If inflation is higher than expected | TIPS wins |
| If inflation is lower than expected | Nominal wins |
Growth Over Time
| Year 5 | Principal: $11,592.74 | Coupons: $1,069.73 |
| Year 10 | Principal: $13,439.16 | Coupons: $2,309.84 |
Use the TIPS Calculator (Treasury Inflation-Protected) above to calculate your results. Enter your values and see instant results — all calculations run in your browser.
Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.
How It Works
This calculator demystifies Treasury Inflation-Protected Securities (TIPS) by projecting your inflation-adjusted principal and real return. Understanding TIPS is crucial for preserving purchasing power, especially with the Congressional Budget Office projecting 2.3% inflation for 2026, which directly impacts your investment's true value.
The calculator determines the inflation-adjusted principal by multiplying the original principal by the cumulative inflation factor (1 + CPI-U change). The real return is then calculated by subtracting this inflation adjustment from the nominal return, providing a clear picture of your purchasing power gain.
Remember that TIPS returns are subject to federal income tax annually on both interest and principal adjustments, even if not received. Also, deflation, though rare, can reduce your principal below its original par value, though it will never fall below par at maturity.
Example: $10,000 TIPS Investment in 2026
- 1 Input: Original Principal = $10,000; Annual Coupon Rate (Real) = 0.5%; Assumed Annual Inflation (CPI-U) = 2.3% (CBO 2026 projection); Investment Period = 5 years.
- 2 Calculation: Year 1 Principal Adjustment: $10,000 * (1 + 0.023) = $10,230. Year 1 Interest Payment (real): $10,230 * 0.005 = $51.15. This process iterates for each year, with the principal adjusting before interest is applied.
- 3 Intermediate Result: After 5 years, with a consistent 2.3% inflation, your principal would have grown to approximately $11,200. Your total coupon interest received over 5 years would be around $275 (real).
- 4 Final Result: Your total inflation-adjusted value after 5 years would be approximately $11,475. This represents a real return that has successfully outpaced inflation, preserving your initial purchasing power and providing a modest real gain, unlike a nominal bond which would have lost purchasing power due to inflation.
Source: SEC · Last updated: April 2026
Frequently Asked Questions
What are TIPS and how do they protect against inflation?
Are TIPS a good investment in 2026?
How are TIPS taxed?
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