How Contractors and Tradespeople Should Track Job Income and Expenses

Contractors and tradespeople have a bookkeeping problem that most other service businesses don’t: your income and expenses are tied to specific jobs, your costs include materials and labor that vary project to project, and your cash flow is often uneven because you’re waiting on draws, progress payments, or final invoices.

That combination makes it easy to fall behind on bookkeeping and hard to catch up. Here’s a practical system for tracking income and expenses so your books stay useful, your tax return is accurate, and your records can hold up to scrutiny.

Separate Your Business and Personal Accounts

This is step one and it’s non-negotiable. If you’re running materials purchases, tool expenses, and customer payments through a personal bank account, your bookkeeping will never be clean. Every deposit looks like income. Every withdrawal looks like an expense. There’s no way to tell what’s business and what’s personal without going through transactions one by one.

Open a dedicated business checking account and a business credit card. Run all business transactions through those accounts. It takes an afternoon to set up and saves hours of cleanup every month.

Track Income by Job or Client

For tax purposes, all your income ends up on one line of the return. But for management purposes — and for answering questions during an examination — you need to know where your income came from. Tracking income by client or by job lets you reconcile payments received against invoices issued, identify who still owes you money, and match income to the 1099s your clients file.

In QuickBooks or Xero, this means creating invoices for each job and recording payments against those invoices. Don’t just dump deposits into a generic income account. The extra minute per transaction saves hours at tax time and during an audit.

Materials vs. Tools vs. Subcontractor Costs

These are three different categories of expense and the IRS treats them differently. Keeping them separate in your books matters.

• Materials and supplies — Lumber, pipe, wire, drywall, paint — anything consumed on a job. These are cost of goods sold or direct expenses depending on your situation.

• Tools and equipment — Items with a useful life beyond a single job. Small tools can be expensed in the year purchased. Larger equipment may need to be depreciated or expensed under Section 179.

• Subcontractor payments — Payments to subs are reported on 1099-NEC if they exceed $600 in a calendar year. Keep these in a separate account so 1099 reporting at year-end is straightforward.

Vehicle and Mileage Tracking

Contractors drive a lot. Between job sites, supply runs, and client meetings, your vehicle is a significant business expense. You have two options: the standard mileage rate (72.5 cents per mile for 2026) or actual expenses. Either way, you need a contemporaneous log — date, destination, business purpose, and miles driven.

Vehicle expenses are one of the most scrutinized deductions in an IRS examination because of the personal-use component. If you claim 100% business use on a vehicle that’s also your personal car, expect questions. A mileage app that logs trips in real time is the simplest way to build a defensible record.

The Receipt Problem (And How to Solve It)

Contractors buy materials at job sites, hardware stores, and supply houses — sometimes multiple times a day. Paper receipts get lost, fade, or end up in a pile in the truck. The solution is simple: take a photo of every receipt at the point of purchase and store it digitally. Apps like Dext, HubDoc, or even your phone’s camera with a dedicated folder work fine.

The habit takes 10 seconds per transaction. The alternative is trying to reconstruct a year’s worth of Home Depot runs from a credit card statement — with no proof of what was purchased or which job it was for.

Build the Habit Now

The best time to set up a clean bookkeeping system is before you need it. The second best time is now. If your books are behind or you’ve been operating without a system, the catch-up gets harder every month you wait.

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If you need help setting up a bookkeeping system that fits how contractors actually work, take a look at our bookkeeping services or schedule a consultation.