Estimate your after-tax profit and ROI on a California house flip, including dealer self-employment tax and capital gains treatment. Updated for 2026.
A flip is taxed on profit, not on the sale price. Profit is your sale price (or after-repair value) minus everything you put in: purchase price, renovation, holding costs, and selling costs. How that profit is taxed comes down to one question the IRS answers for you: are you a dealer or an investor?
Buy at $1,200,000, put in $250,000 of rehab, $60,000 of holding costs, sell at $1,800,000 with $126,000 in selling costs, taxed as a dealer:
That is why margins matter so much on a flip: tax and transaction costs eat thin spreads quickly. Before you buy, model your full sale net sheet, check the capital gains math if you might hold instead, and if the property is a true long-term rental, compare a 1031 exchange. The single biggest lever, though, is buying right and selling for the strongest price, which is where a local agent earns the spread back.
Profit on a flip is your sale price minus total project cost (purchase, renovation, holding, and selling costs). Active flippers are usually taxed as dealers, with profit treated as ordinary income plus self-employment tax. Passive investors are taxed at capital gains rates, short-term if held under a year, long-term (0%, 15%, or 20%) if held a year or more, often with the 3.8% Net Investment Income Tax. California taxes the gain as ordinary income up to 13.3% either way.
It depends on dealer versus investor status. Someone who flips regularly as a business is usually a dealer: profit is ordinary income and also subject to roughly 15.3% self-employment tax, with no capital gains rates and no 1031 exchange. An investor who holds and flips occasionally can qualify for capital gains treatment, including the lower long-term rates after a year. Dealer status is fact-specific, so confirm yours with a CPA.
A California flipper taxed as a dealer can pay a combined rate above 50% of profit once you stack the top federal ordinary rate (up to 37%), self-employment tax (~15.3%, phasing down above the Social Security wage base), and California income tax up to 13.3%. An investor holding more than a year pays less: a long-term federal rate of 15% or 20%, plus 3.8% NIIT, plus California tax.
Generally no. Property held primarily for resale does not qualify for a 1031 like-kind exchange, which is reserved for property held for investment or business use. Flippers who want to defer tax usually have to change strategy, for example holding the property as a rental long enough to establish investment intent. Confirm with a CPA and a real estate attorney before relying on it.
Before you write an offer on a flip, get a local read on the ARV, the buyer pool, and the resale risk. Call Lisa first.
Call (650) 668-1868Not tax advice. Consult your CPA before buying or selling.