Defined benefit and cash balance plans let high-earning solo professionals over 45 deduct $150,000 to $290,000 a year — three to four times what a SEP-IRA or Solo 401(k) allows. This guide walks through the contribution math, candidate profile, costs, deadlines, and how to stack a DB plan on top of a Solo 401(k).
A side-by-side comparison of the simplified $5-per-square-foot method and Form 8829's actual expense method for the 2026 home office deduction, with worked examples, depreciation recapture math, carryover rules, and a decision framework for self-employed filers.
Section 162(l) lets self-employed taxpayers deduct 100% of medical, dental, vision, Medicare, and long-term care premiums above the line on Schedule 1, Line 17 via Form 7206. This guide covers the earned-income ceiling, the subsidized-employer trap, the S-corp W-2 inclusion step, and the ACA Premium Tax Credit iteration for the 2026 tax year.
How the IRS Section 183 nine-factor test decides whether your side activity's losses are deductible in 2026, what the three-of-five safe harbor really means, and what 2025's Young v. Commissioner reveals about the records that win in Tax Court.
A Solo 401(k) crosses into mandatory Form 5500-EZ filing once combined plan assets exceed $250,000 on the last day of the plan year. Late filings cost $250 per day up to $150,000 annually, but Rev. Proc. 2015-32 caps catch-up filings at $1,500 per plan if no penalty notice has been issued.
Section 183 of the Internal Revenue Code denies loss deductions for activities not engaged in for profit. The IRS applies a nine-factor test and a three-of-five-years safe harbor (two of seven for horses) to distinguish a real business from a hobby — here is what each factor weighs and how to document profit motive before an audit.
U.S. cash balance pension plans let solo doctors, attorneys, and consultants deduct $100,000–$370,000 a year on top of a Solo 401(k). 2026 contribution limits, a worked example for a 54-year-old physician, and the actuarial commitments to weigh before signing.
A working-age self-employed professional is roughly three times more likely to become disabled than to die before 65, yet most carry no disability coverage. This guide explains the four policy types, the clauses (own-occupation, elimination period, benefit period) that decide whether claims pay, 2026 premium ranges of 1–4% of income, and the after-tax-vs-deductible premium choice that can shift net benefits by six figures.
Self-employed filers can claim the federal Earned Income Tax Credit on Schedule C net earnings, with a 2025 maximum of $8,046 for families with three or more children. This guide covers eligibility thresholds, how to compute earned income (including the half-SE-tax adjustment), the documentation that survives an audit, and the pitfalls that disqualify otherwise valid claims.
Section 280F caps first-year depreciation on passenger autos at $20,300 in 2026, but SUVs and trucks rated above 6,000 lbs GVWR escape those limits and can combine a $32,000 Section 179 deduction with 100% bonus depreciation. A practical guide to the 2026 numbers, the heavy-vehicle and pickup carve-outs, the 50% business-use cliff, and the mileage-log standards an IRS auditor expects.
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