How Much Rent Can I Afford?

The 30% rule and why it matters

The classic guideline: spend no more than 30% of your gross monthly income on housing. The rule predates the modern rental market and current mortgage rates, but it still works as a sanity check. If your rent or mortgage payment exceeds 30% of gross income, you have less margin for everything else: food, transportation, savings, emergencies, kids.

The number on this page is the 30% answer for your specific income. The calculator runs the math, formats it for Massachusetts, New Hampshire, and Maine homebuyers, and gives you a starting point for what to budget at.

Why the 30% number is hard to hit in MA, NH, and Maine

Housing costs vary wildly by town across this region. Cambridge, Boston, and the inner ring of Massachusetts suburbs can run $2,500 to $3,500 per month for a two-bedroom. Smaller cities like Lowell, Lawrence, or Manchester NH typically come in around $1,400 to $1,800. Southern coastal Maine ranges from $1,400 to $2,200 depending on town and proximity to Portland. Rural inland Maine drops to $1,000 to $1,400.

If your 30% target does not cover any rental in the towns you want to live in, that result is useful information. It usually means one of two things. You can look at different towns where the same monthly outflow goes further. Or you can look at first-time-buyer programs and financing structures that change the affordability equation entirely.

What this calculator does and does not show

This calculator gives you a back-of-envelope number for rent affordability under the 30% rule, plus a comparable home purchase price at current mortgage rates. It does not include:

• Town-by-town property tax variance. Rates swing 2x to 3x between nearby towns in MA, NH, and Maine.
• State first-time-buyer programs that could lower your down payment or eliminate PMI.
• Mortgage interest and property-tax deductibility for taxpayers who itemize.
• State-specific homestead protections, transfer taxes, Deed Excise Tax, or closing-cost overlays.
• Your specific credit score, debt-to-income ratio, or down-payment cash situation.

For a precise number on your scenario with those factors included, talk to GoldCoast directly. The calculator above is the headline. The conversation is where the headline turns into a real plan.

If you have run the numbers, here is the question worth asking next

The calculator tells you your max rent. It also shows what the same monthly outflow buys as a home instead. For a lot of people using this tool, the second number is the surprise, and the question that follows is: would I actually be better off buying?

The rest of this article is for people asking that question. If you are renting for non-financial reasons (you want flexibility, you are between life stages, you love your neighborhood and there is nothing for sale), the calculator’s first answer is the one that matters and the rest is reading. If you are open to looking at the alternative, here is the case.

The real cost of renting for a decade

Run the calculator above. Say you’re earning $80,000 a year, the 30% rule says you can spend $2,000 a month on housing, and that monthly outflow buys you a roughly $266,000 home or $2,000 in rent. Now picture a decade of paying that $2,000 to a landlord. You’ve handed over $240,000. Your savings account in equity is zero. Your name on a deed is nowhere. Your protection if rent goes up 8% next year is none.

That same $240,000, spread over ten years of mortgage payments, builds you somewhere between $40,000 and $70,000 in equity, depending on rate and loan structure. You own an asset that almost certainly appreciated. And the payment you locked in at year one is the same payment in year ten. The renter next door is paying 50% more than they did when they signed.

This is the part of the rent-vs-buy decision calculators rarely show in one place. The calc above gives you the headline. The article below explains why the headline matters.

What owning gets you that renting cannot

Equity, from day one

Every mortgage payment is split between interest (what you pay the lender for the money) and principal (what you pay down on the loan). In the early years the interest share is larger, but the principal share is still real. Five years in, you typically own 7% to 12% of the home value outright. Ten years in, often 15% to 20%. The renter has 0%, forever, no matter how long they stay.

A payment that doesn’t move

A 30-year fixed mortgage is the most stable monthly payment in American consumer finance. Your principal and interest do not change for thirty years. Rent does. In Massachusetts, the average rent has gone up roughly 4% to 6% a year over the last decade. A locked mortgage payment becomes a smaller share of your income every year as you earn more. Rent becomes a larger one.

Tax deductibility

If you itemize on your federal return, mortgage interest and state property tax are deductible, subject to the SALT cap for property tax. For most first-time buyers in MA, NH, or Maine, this means a tax bill a few thousand dollars lower than a comparable renter pays. The IRS does not give renters a “rent deduction.”

Homestead protection

Massachusetts automatically homesteads $125,000 of equity in your primary residence the moment you take title. File a declared homestead at the registry of deeds and that protection goes up to $500,000. New Hampshire homesteads $120,000 per individual, $240,000 per couple. Maine homesteads $80,000 per individual. Creditors cannot reach this protected equity in most circumstances. Renters get no equivalent protection because they have no equity to protect.

Leverage on appreciation

This is the underappreciated one. Put 5% down on a $300,000 home, the home appreciates 4% in a year, and the home is now worth $312,000. Your equity went from $15,000 to $27,000. That is an 80% return on your $15,000 down payment in one year, because the appreciation worked on the entire $300,000, not just the slice you funded. Renters get 0% of any appreciation in their building.

First-time-buyer programs in MA, NH, and Maine

Most first-time buyers do not put 20% down. They do not need to. Each of the three states runs first-time-buyer programs that pair lower down-payment requirements with rate buy-downs or down-payment assistance.

Massachusetts

MassHousing’s ONE Mortgage requires 3% down, no PMI, and offers a subsidized interest rate. MyMassMortgage and MassHousing Mortgage with MI Plus pair conventional financing with the MI Plus job-loss insurance benefit. Income limits vary by area but reach into the low-to-mid $100Ks for households of three or four in eastern MA.

New Hampshire

NHHFA Home Preferred and Home Preferred Plus offer 3% down conventional financing with reduced mortgage insurance and an income-eligibility ceiling. Home Flex Plus adds down-payment assistance of up to 4% of the loan amount.

Maine

MaineHousing’s First Home Loan offers 3.5% down with a low fixed rate, plus the Advantage program which provides $5,000 to $10,000 in down-payment and closing-cost assistance for eligible buyers.

These programs change the calculator math. If you qualify, the home equivalent of your monthly outflow goes up because your down payment requirement and PMI go down. The calc above uses 5% down as a reasonable middle. The real number for you could be better.

“I can’t afford to buy”

This is the most common reason renters keep renting. It is sometimes true and often a budgeting question.

If your gross income covers a $2,000 monthly housing payment, and the calc above shows that $2,000 buys a $266,000 home, the math is not the blocker. The blockers are usually: down payment cash, credit score, debt-to-income ratio (especially student loans or car loans eating the affordability ceiling), and whether anything in your local market is actually listed at the price the calculator surfaces.

Each of those has a path. Down payment cash can come from a down-payment-assistance program. Credit can be repaired faster than people think. DTI can be improved by paying down one card or refinancing a car loan. And market availability changes with the seasons and the towns you are willing to consider.

A 15-minute conversation with GoldCoast usually identifies which of those is your actual blocker. It is almost never the math.

Your next step

The calculator above gives you the headline. The article gives you the reasoning. The pre-approval letter is the document that turns the reasoning into an actual home you can put an offer on.

Talk to GoldCoast and we will model your real number, accounting for your income, credit, down payment options, and the towns you want to live in. No pressure, no payment, no commitment. Just real numbers on your scenario.

Related guides at GoldCoast

• All mortgage calculators: PMI, cost of renting, and the rest of the suite
• Massachusetts mortgage calculators: MA-specific tools, MassHousing program eligibility, town property tax estimators
• New Hampshire mortgage calculators: NH-specific tools, town property tax, NHHFA programs, and Transfer Tax math
• Maine mortgage calculators: ME-specific tools, town property tax, MaineHousing programs, and Real Estate Transfer Tax
• PMI calculator: see exactly what private mortgage insurance adds to your monthly payment
• Cost of renting calculator: what you will pay your landlord over 5, 10, or 20 years of renting
• Practice mortgage payment: train yourself on the payment before you own
• First step to buying a home: start your conversation with GoldCoast

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