True-up calculator
Prefilled with this article's example: one contract, one overhead pool, one fiscal year. Change the base or either rate to see which way the variance runs.
Actual indirect costs exceeded what you billed provisionally. The government owes you the difference.
$400,000 × (28% − 26%) = $8,000
Running this mid-year? Use your actual rate to date in the third box. If a large gap is already visible, FAR 42.704(c) lets the billing rate be revised before it compounds, by agreement with the contracting officer or auditor.
Illustrative figures. Fringe, overhead, and G&A each true up against their own base, and the results across pools net against each other.