7 Tax Write-Offs Solopreneurs Forget Every Year
Sam's List Editorial | 2026-06-27
Solopreneurs tend to overpay tax not by missing the obvious deductions but by forgetting the legitimate ones that require a little tracking. Each forgotten write-off is money left with the IRS for no reason. Here are seven tax write-offs solopreneurs forget every year, each with what you need to claim it properly.
One rule applies to all of them: a deduction you cannot substantiate is a deduction you should not claim. The goal is to capture what you are entitled to, with the records to back it up, not to stretch.
1. The Home Office Deduction
If you use part of your home regularly and exclusively for business, you may be able to deduct related costs. Many solopreneurs skip it out of audit fear, but claimed correctly with proper records, it is legitimate. What you need: a dedicated space and a reasonable method for calculating it.
2. Health Insurance Premiums
Self-employed individuals may be able to deduct health insurance premiums under specific rules. It is easy to overlook because it is not a typical business expense. What you need: eligibility under the self-employed health insurance rules and accurate premium records.
3. Retirement Contributions
Solo 401(k) and SEP IRA contributions can both build retirement savings and reduce taxable income, with higher limits than a basic IRA. Many solopreneurs never set one up. What you need: the right account and attention to contribution limits and deadlines.
4. The Qualified Business Income Deduction
Many self-employed people may qualify for a deduction of up to a portion of qualified business income, subject to limits and phase-outs. It is valuable and frequently misunderstood. What you need: eligibility under the rules, which depend on your income and business type.
5. Business Use of Your Vehicle
If you drive for business, you can generally deduct the business portion using either mileage or actual expenses. Solopreneurs often forget to track it and lose the whole deduction. What you need: a contemporaneous mileage log or expense records.
6. Software, Subscriptions, and Tools
The small recurring costs of running a solo business, software, subscriptions, professional tools, add up and are deductible, yet they slip through unrecorded. What you need: a system that captures these as they happen rather than at year-end.
7. Professional Development and Education
Courses, books, and training that maintain or improve skills for your current business can often be deductible. Solopreneurs forget these routinely. What you need: a clear connection to your existing business and documentation of the cost.
Why a System Beats Memory
The thread through all seven is tracking. You cannot deduct what you did not record, and April is too late to reconstruct a year. Solopreneur Tax is a Sam's List firm focused on solopreneurs and the self-employed, the kind of specialist that builds the system so these deductions are captured all year, not remembered too late.
Solopreneur Tax has 10 verified client reviews on Sam's List as of 2026-06-26. Reviews reflect the experiences of individual clients, do not represent an endorsement by Sam's List, and are not indicative of future results.
Eligibility is fact-specific, so confirm your situation with a professional. Review Solopreneur Tax's profile on Sam's List.
Frequently Asked Questions
Is the home office deduction an audit risk? Claimed correctly, it is a legitimate deduction, not a red flag. The requirements are that the space is used regularly and exclusively for business and that you calculate it reasonably and keep records. Skipping it out of fear simply means overpaying on a deduction you are entitled to.
What's the most overlooked self-employed tax deduction? Retirement contributions and the qualified business income deduction are among the most valuable and most overlooked, along with the self-employed health insurance deduction. Each can meaningfully lower taxable income but requires setting things up correctly and meeting specific rules.
How do I track deductions as a solopreneur? Use a system that captures expenses as they happen, dedicated business accounts, a bookkeeping tool or app, and a mileage log if you drive for business. Recording throughout the year, rather than reconstructing at tax time, is what keeps legitimate deductions from slipping away.
Do I need an accountant as a solopreneur? Not always, but one who understands self-employment can help you capture deductions, set up retirement accounts, and stay compliant, often saving more than the fee. At minimum, a system or specialist that tracks deductible expenses through the year pays for itself in recovered write-offs.