Sell if you need the equity, the house will not cash flow, or you do not want to be a landlord. Keep and rent if the numbers work with honest expenses and you can hold reserves. The deciding tool is a year-by-year wealth projection of both paths, and the crossover year is its headline number.
Most people facing this choice are not investors who went shopping for a rental. They are owners who are moving, and the house they already own is suddenly an investment decision with a deadline. The listicle advice (“consider your market, consider your temperament”) is not wrong, it is just unquantified. This guide runs the actual math with the rent vs sell calculator, every figure computed by the same engine the calculator runs, and covers the two tax clocks that start ticking the day a former home becomes a rental.
What does the rent vs sell decision actually come down to?
One comparison: the wealth you would have at your horizon if you keep the house and rent it, against the wealth you would have if you sell today and reinvest the net proceeds. Everything else, the rate lock, the rent, the taxes, the landlord work, is an input to one of those two lines.
The keep-and-rent line is built from growing home equity (appreciation plus loan paydown) and the rental’s cash flow after real expenses. The sell-and-reinvest line is simpler: the net proceeds after selling costs, compounding at whatever return you believe your next-best alternative earns. That reinvestment return is the opportunity cost of keeping the house made explicit, and it is the input people most often leave at a flattering default. Set it honestly. A point of difference in that one assumption moves six figures over a decade.
What the comparison deliberately excludes matters too: it does not model your time, the 2 a.m. plumbing call, or the tenant who stops paying. Those are real and they price differently for different people, which is why the calculator answers the wealth question and leaves the temperament question to you.
Will renting my house actually cash flow?
Only after charging expenses most first-time landlords forget. The projection trims the lease amount for vacancy, then charges maintenance, management, property tax, and insurance before a dollar counts as income. A house that rents for 2,800 dollars a month is not a 2,800 dollar a month business.
In the calculator’s default scenario, the 2,800 dollar rent carries a 5 percent vacancy allowance, 5 percent for maintenance, 8 percent for management, 4,500 dollars a year of property tax, and 1,800 dollars of insurance, all before the 6.5 percent mortgage payment on the remaining 250,000 dollar balance. The rent covers it, but the margin is a business margin, not a windfall. A useful sanity screen from the rental world: operators often assume around half of gross rent eventually goes to expenses over time, a heuristic rather than a rule, but a good antidote to lease-price optimism.
If the honest inputs produce negative cash flow, keeping the house is not automatically wrong, appreciation and paydown can still carry the path, but you are then funding the gap every month from your own pocket and betting on the exit. Know which bet you are making before you make it.
What is the crossover year, and where is it in the worked example?
The crossover year is the year one path’s cumulative wealth overtakes the other’s. Before it, one choice is ahead; after it, the other is. It is the single number that captures how horizon-sensitive this decision is, and sometimes it does not exist because one path leads the whole way.
That is exactly what happens at the calculator’s defaults. Selling today nets 168,500 dollars after 7 percent selling costs on the 450,000 dollar home. Reinvested at 6 percent, that grows to 301,757.84 dollars by year ten. The keep-and-rent path reaches 384,654.52 dollars, and it is ahead in year one already:
| Year | Keep and rent | Sell and reinvest |
|---|---|---|
| 1 | 186,396.93 dollars | 178,610.00 dollars |
| 3 | 224,402.80 dollars | 200,686.20 dollars |
| 5 | 265,595.25 dollars | 225,491.01 dollars |
| 7 | 310,286.58 dollars | 253,361.70 dollars |
| 10 | 384,654.52 dollars | 301,757.84 dollars |
Read the no-crossover result correctly: it does not say renting always wins, it says renting wins at these inputs for any holding period. Raise the reinvestment return, drop the rent, or slow the appreciation and the sell line can catch up and cross, and the calculator will report the year it happens. The crossover year is an output of your assumptions, which is precisely why it is worth computing rather than guessing.
How much is a low mortgage rate really worth if I keep the house?
A locked, low fixed rate is cheap leverage you cannot replace at today’s pricing, and the comparison prices it automatically: the keep path carries your actual mortgage payment, so the lower your locked rate, the less rent it takes for the property to carry itself and the faster the keep line climbs.
The mistake is treating the rate as a trump card instead of an input. The equity trapped in the house earns house returns, not mortgage-rate savings. If the property is a mediocre rental, a great loan on it is still financing a mediocre rental, and the sell line, powered by the reinvestment return on the full net proceeds, can win anyway. The clean way to think about it: the keep path profits from the spread between what the whole asset earns and what the debt costs. A 2.6 percent mortgage widens that spread dramatically; the default scenario’s 6.5 percent narrows it. Run your real rate and let the projection say what the lock is worth in dollars over your horizon, rather than letting the phrase “I can never get this rate again” decide six figures by itself.
What taxes apply if I rent my house and then sell later?
Two clocks start when a home becomes a rental, and both are commonly discovered too late. The first is the Section 121 exclusion clock: per IRS Topic 701, you can exclude up to 250,000 dollars of gain, 500,000 on a joint return, if you owned and used the home as your main home for at least two of the five years before the sale. Move out and rent the place, and the use test keeps looking back five years from whenever you sell, so after roughly three years as a rental the exclusion lapses. IRS Publication 523 covers the details, including periods of nonqualified use that can reduce the exclusion even when you otherwise qualify.
The second clock is depreciation. As a landlord you depreciate the building and deduct it against rental income, per IRS Publication 527, and when you sell, the depreciation taken after May 6, 1997 is recaptured and taxed even when the Section 121 exclusion shelters the rest of the gain. Recapture is the tax bill first-time landlords most often do not see coming, because it accrues silently from the first year of renting.
This guide stays at the concept level on purpose. For the actual dollar math on a sale, the home sale capital gains calculator runs the exclusion and the federal tax on the taxable gain, and capital gains tax explained covers the bracket mechanics. For the interaction of recapture, nonqualified use, and your specific dates, a tax professional is the right tool, not a playbook.
When does renting win, and when does selling win?
Neither path is the default. The honest version is a set of conditions, and most real situations show a mix:
| Renting tends to win when | Selling tends to win when |
|---|---|
| The rent covers honest expenses with margin | The property cannot cash flow at a realistic rent |
| Your locked mortgage rate is far below today's | You need the equity for the next home's down payment |
| You have reserves for vacancy and repairs | A vacancy or a roof would break your budget |
| You would buy this house as a rental today | You are keeping it only to avoid deciding |
| Your horizon is long enough for compounding to work | The Section 121 window would lapse and the gain is large |
| You accept the landlord job or will pay for management | You do not want tenants, and no fee fixes that |
One test on that list deserves its own sentence, because it cuts through most of the fog: would you buy this exact house, at its current value, as a rental investment today? If the answer is no, you are not keeping an investment, you are avoiding a transaction.
Your next step
Run your own scenario. Open the rent vs sell calculator, enter your home’s value, your balance and rate, a rent you can defend, and expenses you actually believe, and it returns both wealth paths year by year, the crossover year if one exists, and the net proceeds if you sold today. Pair it with the seller net proceeds calculator to pressure-test the selling costs, and with what it really costs to sell a house for where those costs come from. If the rental path looks strong, grade it like an investor would with the rental property ROI calculator before you commit.
This is educational information, not financial or tax advice. The figures here are the calculator’s illustrative defaults, computed by the same engine the calculator runs; your inputs will produce different results, and tax outcomes depend on facts and dates that belong in front of a tax professional.