Tax Deductions Every Dad With a Side Hustle Misses

The first year I had freelance income, I paid taxes on every dollar. No deductions. I didn't know I could deduct my home office, my internet bill, my software subscriptions, or the 3,400 miles I drove to meet clients. I overpaid by about $2,800.

That's money I gave the government for free because I didn't track expenses. If you have a side hustle, freelance income, or any self-employment income, you're probably doing the same thing.

Here's every deduction you can legally take, and a tracker to make sure you don't miss them.

---

---

The deductions most side hustlers miss

Home office deduction

If you have a dedicated space in your home for your side hustle, you can deduct a portion of your rent/mortgage, utilities, and internet. The simplified method gives you $5 per square foot, up to 300 square feet ($1,500 max). A spare bedroom that's 120 square feet = $600 deduction. The space must be used regularly and exclusively for business Source: IRS Topic No. 509 . A corner of the dining table doesn't count. A dedicated desk in the basement does.

Internet and phone

If you use your internet and phone for your side hustle, you can deduct the business percentage. If you estimate 30% of your internet use is for business, deduct 30% of your internet bill. Same for your cell phone plan. Over 12 months, that's often $400-600.

Software and subscriptions

Every tool you pay for that's used in your side hustle is deductible. Adobe Creative Cloud. Canva Pro. Your domain registration. Hosting. Email marketing tools. Invoicing software. Project management tools. AI writing tools. These add up to hundreds or thousands per year.

Mileage

The 2026 standard mileage rate is 70 cents per mile Source: IRS Standard Mileage Rates . If you drive to meet clients, attend networking events, go to the post office for business, or make any business-related trip, log the miles. 100 miles a month = $840 per year in deductions. The tracker has a mileage log tab. Use it every time you drive for business.

Equipment and supplies

Laptop. Monitor. Desk. Chair. Printer ink. Office supplies. If you bought it for your business, it's deductible. Items under $2,500 can be deducted in full the year you buy them (Section 179). That new laptop for freelancing? Full deduction.

Education and training

Online courses. Books. Conferences. Workshops. If they're related to your side hustle, they're deductible. That $199 copywriting course? Deductible. The $29 book on freelancing? Deductible.

Health insurance premiums

If you're self-employed and not eligible for employer-sponsored insurance (or choose not to use it), you can deduct 100% of your health insurance premiums. For a family plan that costs $1,500/month, that's $18,000 in deductions. This only applies if your side hustle shows a profit.

Self-employment tax deduction

You pay 15.3% self-employment tax on your side hustle income (the employer + employee share of Social Security and Medicare). The IRS lets you deduct the "employer" half (7.65%) from your income. This happens automatically on Schedule SE, but it's money most people don't realize they're saving.

Retirement contributions

Open a SEP-IRA or Solo 401k for your side hustle income. You can contribute up to 25% of your net self-employment income to a SEP-IRA. That money reduces your taxable income dollar for dollar. A side hustle making $30,000/year? You could shelter $7,500 in a SEP-IRA.

---

Quarterly estimated taxes

If you expect to owe more than $1,000 in taxes from self-employment income, you need to pay quarterly estimated taxes. Miss them and you'll owe a penalty in April.

Due dates: April 15, June 15, September 15, January 15 (of the following year).

The tracker has a quarterly estimator tab. Enter your revenue and expenses each quarter. It calculates your estimated tax payment using the safe harbor method (pay 100% of last year's tax liability, or 110% if your income was over $150,000). No surprises in April.

The system

Track expenses as they happen. Don't save it for April. When you buy something for your side hustle, open the tracker and log it. Date, amount, category, vendor. Takes 10 seconds. Do this all year and tax season becomes a 30-minute exercise instead of a weekend of panic.

Keep receipts digitally. Photo of every receipt. Email confirmations for online purchases. Save them in a Google Drive folder organized by year. If the IRS ever asks, you have everything.

If your side hustle earns more than $10,000-15,000 a year, get an accountant. The cost ($200-500 for a simple Schedule C) will pay for itself in deductions you'd miss on your own. Hand them the completed tracker in April and they'll handle the rest.