Live-In Flip Section 121 Tax Exclusion Calculator
Section 121 of the IRS code allows up to $250K capital gains exclusion (single) or $500K (married filing jointly) on the sale of a primary residence — provided you owned and lived in it 2 of the last 5 years. Live-in flippers use this annually.
Section 121 Requirements
Two tests: ownership (you owned the property at least 2 of the last 5 years) and use (you lived in it as primary residence at least 2 of the last 5 years). Both must be satisfied. Periods need not be consecutive.
What Counts As Capital Improvement
IRS Publication 523 lists qualifying improvements: additions, new roof, new HVAC, kitchen remodel, bathroom remodel, foundation work. Repairs and maintenance (painting, patching) do not count and cannot be added to basis.
Live-In Flip vs Investment Flip Tax Gap
A pure investment flip pays ordinary income rates (up to 37% federal) plus self-employment tax (15.3%) on profits — total can exceed 50% combined. Live-in flip pays $0 federal tax on the first $250K/$500K. The tax savings often dwarf the inconvenience.
Source: IRS Publication 523 Selling Your Home; 26 USC §121. Last updated: May 2026.