Your friend texts you a photo of a key. The caption is just three exclamation points. They closed on a one-bedroom condo this afternoon, the one near the light rail, and the photo is them holding the key in a way they have clearly seen on Instagram. You send back the appropriate emojis. Then you sit in your apartment, on a couch you bought used three years ago, and you start running an internal calculation that you have been running, on and off, for about eighteen months. Should you be buying too? Are you the only person you know still renting? Is every month of rent another month of “throwing money away”?

That phrase is the most expensive cliché in adult finance, because it is half-true in a way that hides the other half. Yes, your rent is gone at the end of the month. But so is roughly half of a typical mortgage payment in the first decade of the loan — interest, taxes, insurance, mortgage insurance if your down payment was below 20%, and a constant trickle of maintenance and repair costs that no closing-cost worksheet ever totals up honestly. The question is not “rent versus buy.” The question is “how long do I plan to stay, and what is the total cost of ownership against that timeline?” If you do not have a clean answer to both, the starter home is statistically more likely to set you back than push you ahead.

What most people get wrong about buying their first place

The dominant story is that buying is a forced savings plan and renting is a money pit. The reality is more specific. A mortgage payment has a principal component (which builds equity, eventually) and a much larger non-principal component (which does not). In the first five years of a 30-year fixed-rate loan, the majority of each payment goes to interest, not principal. The amortization curve is brutal early. If you sell within those first five years, the equity you have built is small — and it has to absorb the cost of selling, which is significant.

The transaction costs alone are larger than most first-time buyers realize. Closing costs on the buy side typically run 2-5% of the purchase price, including loan origination, title insurance, appraisal, and various government recording fees. On the sell side, agent commissions plus closing costs typically total 6-9%. According to the National Association of Realtors’ Profile of Home Buyers and Sellers, the median seller in recent years stayed in their home about 10 years — but for first-time buyers in their 20s and early 30s, the timeline is dramatically shorter, often 3-5 years before a job change, a relationship change, or a kid forces a move.

If you bought a $300,000 condo with 5% down, lived there four years, and sold for the same price, you would walk away with less money than you came in with. The math is roughly: ~$10,000 in closing costs to buy, ~$21,000 in agent commissions plus closing costs to sell, ~$5,000-$10,000 in maintenance and small repairs you will not be able to skip, and the principal you actually built (which on a $285,000 loan is something like $25,000 over four years). After all those line items, the equity you “built” has been almost completely eaten by the cost of getting in and out. And that assumes flat prices. If the local market dipped, you are underwater on a deal that felt like the responsible adult choice.

The other thing the starter-home story underestimates is maintenance. The widely cited rule of thumb in industry guides like Zillow’s homeownership cost data and the NAR’s homeowner research is roughly 1% of the home’s value per year for ongoing maintenance and repair, on average. On a $300,000 home that is $3,000 a year, every year, on top of the mortgage, taxes, and insurance. Sometimes it shows up as a quiet $200 month. Sometimes it shows up as a $9,000 roof or a $6,000 HVAC compressor in a single weekend. You do not get to skip it. You only get to choose whether you are surprised by it.

The mechanism: why short timelines and starter homes do not mix

There is a reason real estate agents and mortgage brokers tend not to volunteer the five-year rule. The five-year rule is the rough heuristic that, given typical transaction costs, modest appreciation, and average maintenance, you need to stay in a home about five to seven years before buying breaks even with renting and investing the down payment. Below that, renting almost always wins on pure dollars; above it, buying tends to win, especially in a stable market.

The cleanest tool for testing this is The New York Times’ rent versus buy calculator, which lets you put in realistic assumptions for maintenance, property tax, insurance, opportunity cost on the down payment, and expected stay length. The trap is that most people use the default assumptions, which tend to be optimistic on appreciation and pessimistic on maintenance. Run it with 1% maintenance, your actual property tax rate (look it up — it varies enormously, from under 0.5% in some Western states to over 2% in parts of New Jersey, Texas, and Illinois), realistic appreciation (the long-run U.S. average, after inflation, is about 1% per year — much lower than people think), and an honest estimate of how long you’ll stay.

The other mechanism is the upgrade cycle, which is rarely talked about because it feels like aspiration rather than a financial mistake. You buy the starter condo at 28. At 32, you and your partner want a yard. You sell — paying ~7% in transaction costs — and buy a small house. At 37, you have a second kid and need another bedroom. You sell again — another ~7% in transaction costs — and buy a bigger house. Each move resets the amortization clock. Each move funds a fresh round of agent commissions. Over a 15-year arc, the upgrade cycle can quietly cost a household six figures in transaction friction alone, on top of the higher property taxes and maintenance that come with each step up. None of it shows up as a “mistake” in the moment. It just shows up as never quite having the savings rate you thought you’d have by 40.

This is not a “renting is always better” argument. Buying makes excellent sense on long timelines, in stable life circumstances, in markets where the rent-to-price ratio is favorable, and especially when the alternative is paying a similar amount for an inferior space. It makes much less sense as the default move for a 26-year-old who just started a job in a new city and feels behind because friends are buying.

What to do this paycheck, and what to do this year

Tonight: do not put in an offer on anything. If you have been browsing Zillow obsessively, close the tab. The decision you are making does not have to be made tonight. The houses will still exist next month.

Open the NYT rent vs buy calculator and run it once with deliberately conservative assumptions: 1% annual maintenance, your real property tax rate, 4% closing costs to buy, 7% to sell, 1% real appreciation, and an honest answer to “how long will I stay here?” Be honest about the last one. If your job is the kind of job where promotions tend to involve relocations, or if you are within two years of a likely relationship transition, or if you are not certain you want to stay in this city for the next decade, the honest answer is probably 3-5 years. Plug it in. Look at the result. Sit with it for a week before you do anything.

This year: if the numbers say renting wins on your actual timeline, the move is to redirect what would have been a down payment into a brokerage account or a Roth IRA, automatically, so the savings do not evaporate into lifestyle creep. The down payment people accumulate for a starter home is often the largest pool of liquid savings they ever build in their 20s. If you do not deploy it into a house, it has to go somewhere structured, or it will quietly get spent on the same upgrade cycle people experience inside a home they own.

If the numbers say buying makes sense on your timeline, the discipline is the opposite of the starter-home upgrade cycle: buy a house you can plausibly stay in for ten-plus years. Slightly more space than you need now, in a neighborhood you would still want to live in if your life shifted in the obvious ways. The boring “skip the starter, buy the keeper” approach saves more money than any single negotiation tactic, because it cuts the largest cost — round-trip transaction friction — off the books entirely.

The deeper pattern here is the same one that drives the new car decision: the part of the cost that is most visible is rarely the part that hurts you most. The mortgage payment is the visible part. The transaction costs, the maintenance, the upgrade cycle, and the opportunity cost of the down payment are the parts that quietly determine whether buying actually built wealth or just rearranged where it sat. Run the math against your real timeline. Do not let “everyone is doing it” finish the sentence for you.

For the question of whether to buy a starter home in your 20s, the honest answer is: probably not, unless you can credibly say you’ll be there at least seven years and the rent-vs-buy calculator agrees. The decision is allowed to be “not yet.”