Should you rent or buy in Boston? A numerical answer

In most major American cities, the debate between renting and buying is a matter of lifestyle preference, but in Boston, it is a high-stakes math problem. If you intend to stay in a home for fewer than six years, the current combination of high interest rates and Massachusetts transaction costs makes renting the mathematically superior choice.

To understand why, we must look past the monthly mortgage payment and evaluate the "sunk costs" of homeownership. In Boston, where the median entry-level condo or starter home now hovers around $750,000, the friction of entering and exiting the market can easily exceed $100,000 over a five-year period. When you compare a $3,100 monthly rent to the true cost of owning that $750,000 property, the winner isn't who you might expect.

The true cost of the $150,000 down payment

The most significant "hidden" cost of buying a home in Boston isn't the property tax; it is the opportunity cost of your capital. To buy a $750,000 home with a 20% down payment, you must hand over $150,000 in cash.

If you choose to rent instead, that $150,000 stays in your brokerage account. Over the last several decades, a conservative diversified portfolio has averaged a 7% annual return. Over a five-year horizon, that $150,000 would grow to approximately $210,382, representing a $60,382 gain. When you buy a house, you "pay" this $60,382 by forfeiting the gains you would have made elsewhere. This is the first number a prospective buyer must clear before they can claim they are "building wealth" through real estate.

Many buyers assume home appreciation will naturally outpace the stock market. However, Boston real estate, while stable, is not guaranteed to grow at 7% every year. From 2023 to 2024, many neighborhoods saw prices plateau as high interest rates cooled demand. If your home only appreciates by 3% annually, your $750,000 asset grows to $869,450. On paper, you made $119,450. But after accounting for the $60,000 you could have made in the S&P 500, your "real" housing profit shrinks immediately.

Monthly outflows: $3,100 rent vs. the $5,600 mortgage

A $3,100 monthly rent in a neighborhood like Jamaica Plain, Quincy, or parts of Dorchester often gets you a renovated two-bedroom apartment. To buy an equivalent property for $750,000 at a 6.8% interest rate, your financial profile changes drastically.

With 20% down ($150,000), your loan amount is $600,000. Your principal and interest payment alone is roughly $3,912. But in Boston, that is only the beginning. You must add:

• Property Taxes: Boston’s residential tax rate is relatively low compared to the suburbs due to the residential exemption, but for a $750,000 property, you can still expect to pay roughly $500 per month (after the exemption).
• Homeowners Insurance: Budget at least $150 per month for a standard policy.
• Condo Fees or Maintenance: In Boston’s older housing stock, maintenance is not optional. Industry standards suggest setting aside 1% of the home’s value annually for repairs. On a $750,000 home, that is $7,500 a year, or $625 a month. If you buy a condo, your monthly HOA fee will likely range from $300 to $600 to cover master insurance, water, and snow removal.

When you add these up, your monthly outflow for owning is approximately $5,187. Compared to a $3,100 rent, you are paying a "homeownership premium" of $2,087 every single month. Over five years, that is $125,220 in additional cash leaving your pocket that could have been saved or invested if you were renting.

The "Round Trip" transaction trap

The most brutal realization for Boston homeowners occurs at the moment of sale. Entering a deal requires closing costs (1% to 2% of the loan value), but exiting a deal is far more expensive. In Massachusetts, it is standard for the seller to pay a 5% commission to the real estate agents involved, plus a state transfer tax (tax stamps) of $4.56 per $1,000 of the sale price.

If you sell your home for $869,450 after five years (assuming 3% annual appreciation), here is what disappears from your check:

• Agent Commissions (5%): $43,472
• Mass Tax Stamps: $3,964
• Legal & Recording Fees: $1,500

In total, you lose about $48,936 just to sell the asset. When you combine the $12,000 it cost to buy the home with the $49,000 it cost to sell it, you have spent $61,000 on transaction friction. For a renter, the cost of "selling" their position is $0. They simply give 30 days' notice and move.

Amortization and the myth of "building equity"

A common argument for buying is that rent is "throwing money away," whereas a mortgage build equity. This is partially true, but the math is heavily front-loaded in favor of the bank.

In the first five years of a $600,000 mortgage at 6.8%, the vast majority of your monthly payment goes toward interest. In year one, you will pay roughly $40,500 in interest and only $6,400 in principal. By the end of year five, you will have paid off approximately $35,000 of your loan.

While $35,000 sounds like a significant sum, remember that you spent over $60,000 in transaction costs to get it. If you sell at the five-year mark, your "equity" is often entirely wiped out by the commissions and taxes mentioned above. You aren't building a nest egg; you are slowly paying back the cost of the move.

The qualitative factors that math can't capture

The numbers clearly favor renting for short-term stays, but data cannot account for the "Boston Factor"—the specific quirks of the local market that can tip the scales.

The first is the stability of the rental market. Boston’s rental increases are notorious. If your $3,100 rent increases by 5% every year, your year-five rent will be $3,767. A fixed-rate mortgage protects you from this inflation. For those who value a predictable monthly housing cost above all else, the premium paid for a mortgage acts as a form of insurance against the city's aggressive landlords.

The second factor is the "Residential Exemption." For those who live in their Boston property as a primary residence, the city offers a significant break on property taxes. In 2024, this exemption can save homeowners over $3,000 a year. If you are looking at properties in the City of Boston proper—rather than suburbs like Brookline or Newton—this tax break shortens the breakeven horizon by several months.

Finally, there is the issue of inventory quality. In many Boston neighborhoods, the best-maintained buildings are condos, not rentals. A renter may be stuck with 40-year-old appliances and drafty windows because the landlord has no incentive to upgrade. An owner can invest $20,000 in heat pumps and insulation, which lowers monthly utility bills and increases the quality of life—factors that don't appear on a spreadsheet but matter deeply in a New England winter.

Finding the breakeven horizon

To find the true breakeven point, we have to look at the "Net Worth" at the end of five years for both a renter and a buyer.

The Renter:

• Starting Cash: $150,000
• Investment Growth: After 5 years at 7%, they have $210,382.
• Monthly Savings: They saved $2,087/month by not having a mortgage. If they invested that savings monthly at 7%, they have an additional $148,000.
• Total Liquid Assets: ~$358,382.

The Buyer:

• Starting Cash: $0 (Invested in the house).
• Home Value: $869,450 (after 3% annual appreciation).
• Mortgage Balance: $565,000 remaining.
• Gross Equity: $304,450.
• Sale Costs: -$48,936.
• Net Cash After Sale: $255,514.

In this realistic scenario, the renter finishes the five-year period with roughly $102,868 more in their pocket than the homeowner. This gap only begins to close as the years go by. In Boston’s current economic climate, the "breakeven" point—the moment when the buyer’s equity finally surpasses the renter’s growing investment account—is typically around year seven or eight.

If you are a medical resident or a professional on a three-year contract, the math is decisive: rent. You will avoid the $60,000 transaction trap and keep your capital liquid. However, if you are settling in for a decade or more, the fixed costs of a mortgage become a hedge against a city that only gets more expensive.

Run your own numbers against 7% stock market returns and a 5% cost of selling. If you don't see yourself staying in the same zip code through 2031, keep your name on a lease and your money in the market. 1500