Why Maine Contractors Overpay on Taxes Every Year — And How Better Bookkeeping Fixes It
If you're a Maine contractor — whether you're in electrical, plumbing, HVAC, carpentry, landscaping, or general construction — there's a good chance you overpaid on taxes last year.
Not because you did anything wrong. Not because your tax preparer made a mistake. But because the deductions you were entitled to weren't documented, and undocumented deductions don't get claimed.
This is one of the most common and most expensive financial problems in the trades. And it's almost entirely a bookkeeping problem.
Here's what's typically going wrong — and how to fix it.
The deductions most Maine contractors miss
The tax code is actually quite generous to contractors and trades businesses. The problem isn't that the deductions don't exist — it's that they're not being tracked consistently throughout the year.
Here are the most commonly missed:
Mileage and vehicle expenses If you drive to job sites in a personal vehicle — which most Maine contractors do — every mile is potentially deductible. At the 2025 IRS standard mileage rate, those miles add up fast over a full season of driving between Lewiston, Auburn, and job sites across Androscoggin County and beyond. But you need a mileage log to claim them. A quick note in your phone or a mileage tracking app at the start and end of each trip is all it takes.
Tools and equipment Hand tools, power tools, ladders, safety equipment — these are deductible business expenses. So is larger equipment, often through accelerated depreciation that lets you deduct the full cost in the year of purchase rather than spreading it over several years. If you bought tools this year and didn't track them, you may have left a significant deduction unclaimed.
Subcontractor payments If you pay subcontractors $2000 or more in a year, you're required to issue them a 1099-NEC — and those payments are deductible to you. Many contractors track these informally and either miss the deduction or face compliance issues at tax time. QuickBooks makes 1099 tracking straightforward when it's set up correctly from the start.
Home office or shop expenses If you use a portion of your home exclusively for business — for estimating, invoicing, storing equipment — that space may qualify for a home office or home business deduction. This one has specific IRS requirements, so it's worth discussing with your tax preparer, but it's frequently overlooked entirely.
Materials purchased for jobs Job materials are obviously deductible — but only if they're tracked. When materials are purchased on a personal card, mixed with household expenses, or paid in cash without a receipt, they disappear from your books and disappear from your deductions.
Why this keeps happening
The reason contractors consistently miss deductions isn't carelessness — it's systems. Or rather, the lack of them.
When you're running a busy contracting business in Maine, the last thing on your mind at the end of a long day on a job site is updating your books. Receipts end up in a truck door pocket. Mileage goes unlogged. Cash purchases vanish.
The fix isn't working harder at bookkeeping. It's having a system that makes bookkeeping take as little time as possible — one that captures expenses as they happen, connects to your bank accounts automatically, and keeps everything organized year-round so nothing falls through the cracks.
What clean bookkeeping actually looks like for a contractor
A well-maintained set of books for a Maine contracting business gives you:
Every deductible expense captured and categorized correctly
Mileage tracked and documented
Subcontractor payments recorded and 1099-ready
A clear picture of what each job cost versus what it earned
No surprises at tax time — just numbers your preparer can work with
That last point matters more than most contractors realize. When your books are clean and organized, your tax preparer spends less time sorting through your records and more time finding opportunities to reduce what you owe. The cost of good bookkeeping often pays for itself in tax savings alone.
The bottom line
You work hard for every dollar your business earns. Good bookkeeping makes sure you keep as much of it as legally possible.
McAfee's Bookkeeping works with Maine contractors and trades businesses to set up clean, organized books that make tax time straightforward and deductions complete. Schedule a free consultation here.
