What Are 8 Deductions and Deferrals Most Side-Hustle Consultants Miss?
You give expert advice for a living — yet your tax return pretends your business runs on vibes. These 8 overlooked deductions and deferrals fix that fast.
On this page
- Summary of What This Blog Covers
- 1. Home office (actual vs safe harbor)
- 2. Self-employed health insurance
- 3. Retirement contributions (SEP / Solo 401(k))
- 4. Mileage & vehicle expenses
- 5. Continuing education & certifications
- 6. Software, subscriptions, tools
- 7. Phone & internet (business %)
- 8. Accountable-plan reimbursements (S Corp)
- Year-End Deduction Checklist
- Want a free deduction audit?
- Frequently Asked Questions
Summary of What This Blog Covers
- Eight powerful write-offs most consultants skip
- Timing plays that cut taxes + build savings
- Documentation that survives questions
- A short checklist + next steps with a pro
1. Home Office — Actual vs $5 Safe Harbor
Exclusive, regular use = deductible. Sketch + photos + utility totals = bulletproof.
2. Self-Employed Health Insurance
Premiums reduce AGI directly. One line on Schedule 1 = big impact.
3. Retirement — SEP IRA or Solo 401(k)
Up to 25% of net profit (or more with Solo 401(k)). Fund by the extended due date.
4. Mileage or Actual Vehicle Expenses
67¢ per business mile in 2025, or actual costs if you track everything.
5. Continuing Education & Certifications
Courses, conferences, books, credentials — all ordinary & necessary = deductible.
6. Software, Subscriptions, Tools
Zoom, Calendly, Notion, Adobe, CRM — if it helps you earn, it’s deductible.
7. Phone & Internet (Business Portion)
Document your method (call logs, Zoom hours). 40–70% is common and defensible.
8. Accountable-Plan Reimbursements (S Corp)
Reimburse yourself tax-free for home office, mileage, health premiums, etc.
Year-End Deduction Checklist (copy-paste)
☐ Home office sketch + photos
☐ Health premium total
☐ Retirement contribution plan
☐ Mileage log
☐ Education receipts
☐ Software list
☐ Phone/internet % method
☐ Accountable-plan policy (S Corp)
Want a free deduction audit?
Book Insogna’s Side-Hustle Deduction Review. We’ll run the numbers on all eight, show you the cash impact, and hand you the exact documentation list. Whether you searched “tax preparer near me,” “Austin Texas CPA for consultants,” or “Schedule C planning,” we turn missed deductions into real refunds.
Frequently Asked Questions
1) Do I need an LLC to claim these?
No — sole proprietors on Schedule C qualify. Entity just changes administration.
2) SEP IRA vs Solo 401(k) — which wins?
Solo 401(k) usually allows bigger total contributions. SEP is simpler and fundable by extension.
3) What’s a reasonable phone/internet %?
Base it on logs. 40–70% is common. Document and round down if unsure.
4) Can I deduct coffee-shop work?
No — but home office + co-working memberships are clearer and usually larger.
5) When should I bring in a pro?
Income jump, S Corp consideration, or before big retirement contributions.

