How we get and check every number
Sources
- Wage determinations: SAM.gov, the official home of Davis-Bacon WDs. We store the full text of the modification we show.
- Federal rules: eCFR (Title 29 Parts 1, 3, 5; FAR Part 28), current as of 2026-11-10.
- State rules: the statute or the state agency's own page, saved with its date.
Checks before a page goes live
- Parser checksThe WD number and last modification in the header must match; amounts outside sane ranges stop the build.
- Quote checkEvery quoted rule must appear word for word in the saved source.
- Independent recalculationA separate script recomputes totals, examples and ranges and compares them with the page.
- Automated testsLinks, structured data, accessibility, speed, mobile layout, calculator edge cases.
Updates
In the last 60 days, 197 of 215 Davis-Bacon modifications posted on a Thursday (SAM.gov publication dates).
We re-check the WDs we publish weekly and show the modification number and date on each page.
Rules are re-checked against eCFR when a page is updated.
Rounding in our calculators
The rules set minimum rates, not rounding methods, so we declare ours. All math is in whole cents.
A derived pay rate (an apprentice percentage, 1.5× for overtime)
is rounded up to the cent, so it is never below the minimum:
47.3% of $36.50 = $17.2645 → $17.27, and 1.5 × $17.27 = $25.905 → $25.91.
A plan credit (annual cost ÷ all hours) is rounded down, so the credit is never overstated: $9,000 ÷ 2,000 h = $4.50.
Each printed line is hours × the rate shown, rounded half-up, and every total is the sum of its printed lines,
so you can redo any line with a hand calculator.
When we compute overtime, we use the exact 1.5× rate (it can have 3 decimals) and round each paid line half-up.