5 Financial Mistakes Contractors Make (And How to Avoid Them)

After 25+ years of working with businesses — and now specializing exclusively in contractors — I've seen the same financial mistakes come up again and again. The good news? They're all fixable.

1. Not Tracking Job Costs

This is the big one. Many contractors know their total revenue and total expenses, but they can't tell you which specific jobs made money and which ones didn't. Without job costing, you're guessing — and guessing leads to underpricing, over-committing, and shrinking margins.

2. Ignoring WIP

Work in Progress accounting isn't optional for contractors — it's essential. Without it, your financial statements don't reflect reality. You might look profitable on paper while actually losing money on active jobs.

3. No Plan for Seasonal Slowdowns

Contracting is seasonal for most trades. If you're spending everything you earn during busy months, the slow months will hurt. The Profit First method — setting aside money in separate accounts — is one of the simplest ways to smooth out the ups and downs.

4. Mixing Personal and Business Finances

It seems harmless, but mixing personal and business expenses makes your books unreliable. It also creates headaches at tax time and makes it nearly impossible to understand your true business profitability.

5. Waiting Too Long to Get Help

Most contractors wait until they're overwhelmed — or until tax season forces the issue — to get their books in order. By then, you're playing catch-up instead of making proactive decisions. The earlier you get professional bookkeeping in place, the better your decisions will be.

The Fix

None of these mistakes are fatal. They're all fixable with the right systems and the right financial partner. If any of these sound familiar, it might be time to have a conversation about getting your numbers on track.