Pavement Lifecycle Cost Calculator
Put two pavement strategies on the same footing: every dollar each one spends over the analysis period, discounted back to today, then spread into an equal yearly cost.
Results
Strategy A
n/a
Net present value
n/a per year
Strategy B
n/a
Net present value
n/a per year
Enter values to compare.
| Rate | Strategy A | Strategy B | Lower cost |
|---|
What the calculator does
Lifecycle cost analysis compares strategies that spend money at different times. A cheaper pavement that needs an overlay every dozen years can cost more over forty years than a pricier one that needs little work, or it can cost less, depending on how heavily future dollars are discounted. The calculator converts every cost to its value today, adds them up, and reports the total as net present value (NPV).
Each future cost is divided by (1 + i) raised to the year it occurs, where i is the real discount rate. Routine yearly maintenance is discounted as a level annuity across the whole period. The value a pavement still holds at the end of the period, often called salvage or remaining service life value, is discounted the same way and subtracted, because a strategy that ends with a newer surface leaves the agency with something worth having. Equivalent uniform annual cost (EUAC) then spreads the NPV into equal yearly payments over the analysis period, which is easier to compare against an annual budget line.
Choosing the inputs
Most state procedures still follow the structure FHWA laid out in its 1998 interim bulletin. Pick a period that covers one or more rehabilitations on every alternative, keep all costs in constant dollars with a real discount rate, and give the treatment schedule the most scrutiny, because it drives the answer. Take the treatment years and costs from your agency's own performance history rather than from a national average where possible.
The default rate here is 2.0 percent, the real rate OMB's Appendix C lists for 30-year cost-effectiveness analyses in 2026. Many state transportation departments publish their own rate, and the sensitivity table shows how the comparison changes if you use a different one. When two strategies trade places within a plausible range of rates, treat them as close to equivalent and let other factors decide. That situation is what the federal alternate bidding procedure was written for, covered in the asphalt versus concrete analysis.
What it leaves out
The calculator counts agency costs only. Work zones impose delay and crash risk on drivers, and FHWA's method allows those user costs to be priced and added, which can reverse a comparison on a busy corridor. It also treats every input as certain. FHWA's RealCost software runs a probabilistic version that assigns ranges to costs and treatment timing. For the background on both, read how lifecycle cost analysis works.
Questions
What discount rate should I use for pavement lifecycle cost analysis?
Use the real rate your agency adopts. Federal cost-effectiveness analyses use OMB Circular A-94 Appendix C, which lists a 2.0 percent real rate for 30-year analyses in 2026. Many state DOTs publish their own rate instead.
Why does the discount rate change which strategy wins?
A higher rate shrinks the present value of costs that fall far in the future. Strategies with a lower initial cost and more frequent later treatments benefit, while strategies that spend more up front to avoid later work lose some of their advantage.
Does this calculator include user delay costs?
No. It compares agency costs only. FHWA guidance treats work zone user costs as a separate component; add them as treatment costs in the year they occur if your agency includes them.