# Revv Blog

> Practical notes for collision estimators and shop owners on estimates, supplements, OEM procedures and short pays.

## [What a line missing from the first estimate costs](https://joinrevv.co/blog/the-cheapest-supplement.md)

Shops lose money on work they never bill and time on work they bill late. Both usually start with the first estimate.

Oct 11, 2026 · 5 min read · Supplements, Estimating

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