My first year in business I owed the IRS $11,400 in April. I had not set aside a dime. That tax bill nearly ended my business before it really started. I scrambled, borrowed from family, and set up a payment plan with penalties and interest tacked on. The entire disaster was avoidable — I just did not understand how self-employment taxes worked. If you are running a handyman business and you have not thought seriously about taxes yet, this is the article that saves you from my mistake.
Self-Employment Tax: The Number Nobody Warns You About
When you work for someone else, your employer pays half of your Social Security and Medicare taxes. When you are self-employed, you pay both halves. That is 15.3 percent right off the top — 12.4 percent for Social Security and 2.9 percent for Medicare. This is in addition to your regular income tax. So if you are in the 22 percent federal tax bracket and your state charges 5 percent, your effective tax rate is closer to 42 percent of your net income.
Let that sink in. For every $1,000 you net, roughly $420 belongs to various tax agencies. This is why the number one rule of self-employed finances is: set aside 25 to 30 percent of every payment you receive into a separate savings account and do not touch it. I use 28 percent because it gives me a small cushion. On a $5,000 month, $1,400 goes straight into the tax account before I pay myself anything.
Quarterly Estimated Payments
The IRS does not wait until April to collect from self-employed people. You are required to make estimated tax payments four times a year: April 15, June 15, September 15, and January 15. If you skip these and pay everything in April, you will owe underpayment penalties on top of your tax bill.
The simplest method: take your previous year's total tax liability, divide by four, and pay that amount each quarter. This is called the "safe harbor" method and it protects you from penalties even if you end up owing more. If this is your first year, estimate your annual income, multiply by 28 percent, and divide by four. You can always adjust as the year progresses.
Pay electronically through IRS Direct Pay or EFTPS — it takes five minutes and you have an instant confirmation. Do not mail a check and hope it arrives on time. Set calendar reminders two weeks before each due date so you are never scrambling.
Deductible Expenses That Reduce Your Tax Bill
Every legitimate business expense reduces your taxable income, which directly reduces your tax bill. Miss a deduction and you are literally paying taxes on money you already spent. Here are the big ones for handymen:
Vehicle Expenses
You have two options: the standard mileage rate (70 cents per mile in 2026) or actual expenses (gas, insurance, repairs, depreciation). Track your mileage from day one and run the numbers both ways at year-end. Most solo handymen driving 20,000-30,000 business miles per year come out ahead with the standard mileage rate. At 25,000 miles that is a $17,500 deduction — not a small number. Keep a mileage log. An app like MileIQ runs in the background and records every trip automatically. The IRS requires a contemporaneous record — a spreadsheet you reconstruct in March from memory does not count.
Tools and Equipment
Every tool you buy for work is deductible. Drill, saw, ladder, tool belt, safety glasses — all of it. Items under $2,500 can be expensed immediately under the de minimis safe harbor election. Bigger purchases like a $4,000 table saw can be depreciated or fully expensed under Section 179. Keep every receipt. I photograph receipts with my phone the moment I leave the store and save them to a dedicated folder.
Insurance
General liability premiums, commercial auto insurance, workers comp if you have it, and your health insurance premiums (which are deductible on your personal return as a self-employed individual) — all deductible. If you are paying $1,500 per year for GL insurance, that is $1,500 off your taxable income.
Home Office
If you use a dedicated space in your home exclusively for business — scheduling jobs, doing invoices, storing records — you can deduct a portion of your rent or mortgage, utilities, and internet. The simplified method gives you $5 per square foot up to 300 square feet, or $1,500 max. The regular method requires more math but can yield a larger deduction if your home office is a significant percentage of your total square footage.
Phone and Internet
The business-use percentage of your cell phone and internet bills is deductible. If you use your phone 70 percent for business (calls, texts, photos, navigation, invoicing), 70 percent of your monthly bill is a deduction. On a $100/month phone bill, that is $840 per year.
Supplies and Materials
Anything you buy for jobs that you do not bill back to the customer — caulk, screws, sandpaper, tape, drop cloths — is deductible. These small purchases add up fast. I tracked mine for a year and was surprised to find I spent over $3,200 on consumable supplies I never billed for. That is a $3,200 deduction I would have missed without good records.
1099 vs W-2: What You Need to Know
If you hire a helper and pay them more than $600 in a year, you are required to issue them a 1099-NEC. This is not optional. If you classify them as a subcontractor, they handle their own taxes and you do not withhold anything. If you classify them as an employee (W-2), you must withhold taxes, pay the employer portion of FICA, carry workers comp, and handle payroll. The IRS has specific rules about who qualifies as a contractor versus an employee — the short version is that contractors control how and when they do the work, while employees work under your direction and schedule. Misclassifying an employee as a contractor can result in back taxes, penalties, and interest going back years. When in doubt, ask a CPA.
Finding a CPA Who Understands Trades
Not all accountants are created equal. You want someone who works with contractors, tradespeople, or small service businesses — not someone whose clients are all tech startups or restaurants. A good trades-savvy CPA knows the specific deductions you are entitled to, understands mileage rules, and can advise on estimated payments accurately.
Ask other handymen or contractors in your area who they use. A CPA who costs $300-500 per year will typically save you more than their fee in deductions you would have missed. Mine found $4,200 in deductions my first year that I had no idea existed. That paid for her services for the next decade. Track all your income and expenses cleanly in HandyBook so your CPA is not sorting through a shoebox of receipts — organized records mean a smaller accounting bill and fewer missed deductions.