Find out how efficiently you'd have to deliver the rest of the work to still finish on budget. Enter your budget, earned value and actual cost to get your To-Complete Performance Index — and an honest read on whether budget is still reachable.
The To-Complete Performance Index (TCPI) is a reality check. It's the cost efficiency the remaining work must achieve for the project to still hit its budget. Where CPI tells you how you've done, TCPI tells you how well you now have to do — and whether that's plausible given how the project has gone so far.
That's the budgeted work remaining (BAC − EV) divided by the budget remaining (BAC − AC). If you're forecasting to a revised budget (EAC) instead of the original, swap BAC for EAC in the denominator.
| TCPI | What it means |
|---|---|
| ≤ 1.00 | Achievable — finish on budget at your current efficiency or better |
| 1.00 – 1.10 | Tight — the rest must be run more efficiently than so far |
| > 1.10 | Unrealistic — usually a signal to re-baseline, not to promise recovery |
The most useful thing about TCPI is comparing it to your CPI. If your CPI is 0.97 but your TCPI is 1.05, you're being asked to suddenly out-perform your whole track record for the rest of the job. That gap is the honest measure of how recoverable a budget really is.
Worked example: BAC $4.2M, EV $1.85M, AC $1.9M. TCPI = (4.2 − 1.85) / (4.2 − 1.9) = 2.35 / 2.3 = 1.02. Slightly above 1.0 — recoverable, but only if the remaining work runs a touch better than it has. See it next to EAC in the full earned value calculator.
TCPI (To-Complete Performance Index) is the cost efficiency the remaining work must hit to finish on budget: (BAC − EV) / (BAC − AC).
To the original budget: TCPI = (BAC − EV) / (BAC − AC). With BAC $4.2M, EV $1.85M, AC $1.9M, TCPI = 1.02.
At or below 1.0 is achievable. Above 1.0 means the rest must beat your track record; much above 1.1 usually means re-baseline.
Aegis puts TCPI next to your actual performance every period and shows what would have to change to hit it — so recovery plans are grounded, not hopeful.
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