ClearRenting vs. Buying in 2026: The Math Most Calculators Get Wrong
Key takeaways
- Most rent-vs-buy calculators ignore opportunity cost — what your down payment and any monthly difference could earn if invested instead.
- The real cost of buying includes property taxes, insurance, maintenance (often 1-2% of home value a year), and closing costs, not just the mortgage payment.
- Buying tends to win if you'll stay 5+ years, rents are rising fast, or you value stability and the ability to renovate.
- The local price-to-rent ratio is a useful shortcut: under about 15 tends to favor buying, above about 20 tends to favor renting.
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A mortgage that's $50 cheaper than rent looks like an easy win — until you count what that $50, plus your entire down payment, could have earned sitting in an index fund instead. That's the piece almost every rent-vs-buy calculator leaves out, and it's often the piece that flips the answer.
The real cost of buying isn't just the mortgage
Property taxes, homeowners insurance, maintenance (often estimated at 1-2% of the home's value per year), and closing costs when you eventually sell all belong in the comparison. A mortgage payment that looks similar to rent on paper is often meaningfully higher once these are added.
The part almost every calculator skips: opportunity cost
A down payment and any monthly difference between renting and owning could instead be invested. If buying costs $500 a month more than renting, and that $500 could have gone into an index fund, the comparison isn't just rent vs. mortgage — it's rent-plus-investing vs. owning.
Renting vs. buying, at a glance
| Renting | Buying | |
|---|---|---|
| Best time horizon | Moving within the next few years | Staying 5+ years to absorb closing costs |
| Price-to-rent ratio | Favors renting above ~20 | Favors buying below ~15 |
| What you gain | Liquidity — savings stay invested instead of tied up in one property | Stability, and the ability to renovate on your own terms |
| Local conditions that help | Rent flat or falling relative to home prices | Rent rising quickly while a fixed-rate mortgage locks in a stable payment |
A more honest way to compare
Look up your local price-to-rent ratio (home price divided by annual rent for a similar property). As a rough guide, ratios under about 15 tend to favor buying, and ratios above about 20 tend to favor renting — though local market conditions, how long you'll stay, and your own finances still matter more than any single number.
Before running any of these comparisons, it's worth confirming how much house you can actually afford in the first place — a mortgage pre-approval alone tends to overstate it.
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Frequently asked questions
Why do most rent-vs-buy calculators give a misleading answer?
Most stop at comparing the mortgage payment to rent, which ignores opportunity cost — what a down payment and any monthly difference between renting and owning could earn if invested instead.
What costs does a mortgage payment leave out?
Property taxes, homeowners insurance, maintenance (often estimated at 1-2% of the home's value per year), and closing costs when you eventually sell all belong in the real comparison.
What is a price-to-rent ratio, and how do I use it?
It's a local home's price divided by its annual rent for a similar property. As a rough guide, ratios under about 15 tend to favor buying, and ratios above about 20 tend to favor renting.
How long should I plan to stay in a home for buying to make sense?
Buying tends to win when you plan to stay long enough — often 5 or more years — to absorb the up-front closing costs.
When does renting tend to be the smarter financial choice?
Renting tends to win when you expect to move within a few years, local home prices are high relative to rent, or you'd rather keep your savings liquid and invested instead of tied up in a single property.