Hourly vs Monthly Rate: Tracking True Cost in Mixed Teams
A finance lead at a 12-person engineering team opens the cost dashboard. Total monthly burn: $58,000. Four full-time engineers on monthly salary, five contractors on hourly rates, three more outsourced through a vendor invoiced monthly. The dashboard shows a single average cost per developer. It is the wrong number, and every per-feature decision built on top of it is also wrong.
The conventional fix is the 160-hour conversion: divide a monthly rate by 160 to get an hourly equivalent, then compare. The US Bureau of Labor Statistics tracks average annual hours actually worked per employee at 1,791 hours. That is 149 hours per month, not 160. In Kazakhstan, a statutory 24-day vacation entitlement plus 13 paid holidays brings the effective figure closer to 144 hours. The 160 number is a hand-me-down from a country that no longer matches its own data.