Renting is not throwing money away
The most persistent myth in housing is that rent is wasted while mortgage payments build equity. Both halves are wrong.
A large share of an early mortgage payment is interest, which builds no equity at all. In the default scenario — a $400,000 home at 6.5% — the first year's payments go overwhelmingly to interest. Add property tax, insurance, and maintenance, and a substantial portion of an owner's monthly outlay is as unrecoverable as rent.
Meanwhile the renter is not merely spending. A renter who invests the down payment rather than committing it to a house has that money compounding. With these defaults, over seven years, renting comes out roughly $35,772 ahead — because $92,000 tied up in a down payment and closing costs would have grown substantially at 7%.
That result flips with different inputs. Longer stays, faster appreciation, cheaper purchase prices relative to rents, or lower assumed investment returns all favour buying. The point is that it is a genuine calculation, not a moral question.
How long you stay is the decisive input
Buying carries large one-off costs at both ends. Closing costs run roughly 2–5% of the price when buying, and selling costs — mostly agent commission — commonly reach 6%. Together that is often 8–11% of the home's value, spent purely on transacting.
You need enough appreciation and equity accumulation to absorb that before ownership pulls ahead. Under five years, buying rarely wins. Beyond ten, it usually does, because the transaction costs are spread thin and the mortgage balance has fallen meaningfully.
This is why the honest first question is not "can I afford a mortgage" but "how confident am I that I will still be here in seven years?" A job change, a relationship change, or a growing family can turn a sound purchase into an expensive one, and the housing market does not care about your reasons for selling.
The costs owners forget
This calculator includes property tax at 1.1% of value annually, insurance at 0.4%, and maintenance at 1%. That maintenance figure is the one people dispute and then discover.
Maintenance is invisible until it is not. Roofs, water heaters, HVAC systems, and appliances all have finite lives, and replacing them is not optional. Averaged over decades, 1% of the home's value per year is a widely used planning figure — higher for older homes, lower for new construction still under warranty.
Renters face none of this. When the water heater fails in a rental, it is someone else's $1,500 problem and someone else's Saturday. That has real value that cash-flow comparisons routinely ignore.
Not included here: HOA dues, which can exceed $500 a month, and PMI if you put down less than 20%. Both would push the ownership case further back.
What the numbers cannot capture
A fixed-rate mortgage freezes your largest monthly cost for thirty years while rents rise around it. In the default scenario rent climbs 3% annually, so by year seven the renter is paying meaningfully more than at the start while the owner's principal and interest has not moved. Over long horizons this effect is powerful.
Ownership also offers control — renovating, keeping pets, not being asked to leave — and forced savings, since paying down principal is a commitment that most people would not sustain voluntarily.
Renting offers flexibility that is worth real money when you use it. Being able to relocate for a better job in a month, without a sale, is a genuine financial asset.
Treat the calculator's output as one input. If it says renting wins by $35,000 over seven years but you want to raise a family in one place, the result may not be decisive. What it should prevent is buying under the impression that renting is automatically wasteful.
Frequently asked questions
- How many years do I need to stay for buying to make sense?
- Commonly five to seven years, but it depends entirely on your local price-to-rent ratio, appreciation, and rates. Use the calculator with your actual figures and adjust the years until the result flips — that break-even point is the number that matters.
- Why does the investment return assumption matter so much?
- Because a down payment is money you could invest instead. That opportunity cost is the single biggest omission in most rent-versus-buy comparisons, and it grows with your assumed return.
- Does this include the mortgage interest tax deduction?
- No. Since the standard deduction rose in 2018, most US filers no longer itemise and get no benefit from it. If you do itemise, ownership is somewhat cheaper than shown here.
- What if home prices fall?
- Set appreciation to a negative number. Because a mortgage is leverage, a modest price fall can wipe out a down payment entirely — a 10% decline on a 20% down payment erases half your equity.