# Boston Home Property Taxes for First-Time Buyers: How Do You Estimate Your Annual Bill on a Starter Condo?
Key Takeaways
•Start with a two-step estimate, then add a cushion. Annual tax = (assessed value ÷ 1,000) × the rate, minus the residential exemption if you'll live there — but treat the result as a planning range, not a final number.
•Use the assessed value, not the sticker price. Assessed value is the dollar value the City of Boston assigns to your unit for tax purposes. It can differ from the price you pay.
•Owner-occupants save real money. Boston's residential exemption cut a qualifying FY2026 bill by about $3,403, per The Boston Home Team — but you must file, and you should confirm the current filing deadline with the Assessing Department.
•Bottom line: budget conservatively. NBC Boston reported a projected 13% increase, about $780, for the average single-family homeowner in FY2026, and broad structural relief for residential bills is not on the near-term horizon.
Why does the tax bill feel so hard to estimate?
Most first-time buyers assume estimating a Boston tax bill takes a finance degree. It doesn't.
For a starter condo, the process boils down to one multiplication, one subtraction, and a cushion for the year's moving parts. You can run this math before your next open house.
That matters right now, in late July 2026, with fresh FY2026 numbers shaping every offer. Taxes aren't a minor line item — they can shift your monthly payment, your loan approval, and the price range that actually feels livable.
Annual tax = (assessed value ÷ 1,000) × rate, minus the residential exemption if it's your home — then add a cushion.
How do you find the assessed value?
Start with the assessed value — the dollar figure the City of Boston assigns to your unit for tax purposes — not the asking price.
It's tempting to multiply the list price and call it a day. Resist that urge for your final estimate.
Market value is what a buyer will pay. Assessed value is what the city uses to calculate taxes. The two often sit close together, but they rarely match exactly.
Before trusting any number, pull the parcel's assessor card from the City of Boston Assessing Department. Assessments are tied to an earlier valuation date, so a recent sale price only gets you in the ballpark.
Falling commercial values can also push more of the tax burden onto homeowners — one more reason your input number isn't fixed.
For your worksheet, write down one figure: the condo's assessed value from the assessor card.
How do you multiply by Boston's residential tax rate?
Divide the assessed value by 1,000, then multiply by Boston's residential rate.
For this example, we'll use the citywide median condo price of about $725,000, per Reference Real Estate, as a stand-in. Substitute the actual assessed value from your assessor card — the two can differ enough to meaningfully change the bill.
We'll apply the $11.58 per $1,000 residential rate reported by BMN Boston. That's an FY2025 rate, so treat it as a starting point that may climb for FY2026.
•$725,000 ÷ 1,000 = 725
•725 × $11.58 = $8,395.50 per year
•Roughly $699.63 per month before any exemption.
The math holds at any price point. A $450,000, $600,000, or $800,000 condo all divide by 1,000 and multiply by the rate the same way.
This gives you the "gross" bill — before any exemption or credit.
Your lender may fold this amount into escrow, the account that collects your property taxes and insurance as part of your monthly payment, so this figure affects your real monthly cost.
How does the residential exemption lower the bill?
Here's the subtraction that can reshape your budget.
If you'll live in the condo as your primary home, you may qualify for Boston's residential exemption — a tax break for owner-occupants that lowers your home's taxable value. Confirm current rules and amounts with your agent or the Assessing Department.
Historical Boston data show the exemption climbing steadily, from $1,880 in FY2015 to $3,153 in FY2021. The chart below tracks that growth; the $3,403 figure used in this worksheet comes from a separately sourced current-year estimate.
Boston Residential Exemption Amounts, FY2015–FY2021
Boston residential exemption amounts for owner-occupied principal residences from FY2015 through FY2021.
| Series | Label | Value |
|---|---|---|
| Residential exemption amount | FY2015 | $1,880 |
| Residential exemption amount | FY2016 | $1,962 |
| Residential exemption amount | FY2017 | $2,433 |
| Residential exemption amount | FY2018 | $2,538 |
| Residential exemption amount | FY2019 | $2,719 |
| Residential exemption amount | FY2020 | $2,880 |
| Residential exemption amount | FY2021 | $3,153 |
Applying the FY2026 $3,403 savings figure reported by The Boston Home Team to our example:
•$8,395.50 − $3,403 = $4,992.50 per year
•About $416.04 per month.
That's a swing of nearly $284 per month — potentially the difference between feeling stretched and feeling stable.
But the credit isn't automatic. To qualify, you generally must occupy the unit as your primary residence, meet the city's rules, and file with the Assessing Department. Confirm current requirements and the filing deadline before you count on it.
If you're buying now, budget the higher gross number first and ask the city how timing applies to your purchase. Keep both figures side by side:
•Gross monthly tax: $699.63 in this example
•Net monthly tax after exemption: $416.04 in this example
What edge cases should first-time buyers watch for?
The clean math works well, but a few situations change the answer.
If you won't be living there, you likely don't get the residential exemption. Investors and non-owner-occupants should plan around the gross number from Step 2. Your assessed value may also reset after you buy, so don't rely solely on the prior owner's bill.
If you're a senior buyer, extra relief may apply. Boston's Clause 41D ties the senior exemption to inflation, so a Social Security bump won't cost you eligibility. It's worth $1,000 to $2,000, per MassLive. Under that same law, income limits rise to $20,540 for individuals and $41,080 for married couples. Real relief — but it reaches only a narrow eligible group.
Should you add a cushion for FY2026?
Yes, and this is where conservatism pays off.
The statewide snapshot shows tax levies rising by $1.2 billion. Of 343 communities, 337 posted a levy increase and six decreased. The median percentage increase came in at 4.2%.
Massachusetts FY2026 Property Tax Snapshot
Headline statewide FY2026 tax levy figures for the 343 Massachusetts communities with certified FY2026 rates.
Tax Levies for 343 Communities
Total increase (FY2025 to FY2026)$1.2 billion
From (FY2025)$22.8 billion
To (FY2026)$24 billion
Tax Levy Change Counts
Communities with tax levy increase337
Communities with tax levy decrease6
Median percentage increase4.2%
You might be wondering: if the $11.58 rate is from FY2025, won't the FY2026 bill run higher? Fair question.
NBC Boston reported a projected 13% increase, about $780, for the average single-family homeowner in FY2026 — a single-family figure, not a condo figure, but useful as a directional signal.
Treat the $11.58 calculation as a starting point, not your comfort-budget number. Build in a cushion that reflects the projected increase until you confirm final figures for your exact address. That protects you from a condo that looks affordable on paper but feels tight once the tax bill actually arrives.
Why does Boston's 2026 tax fight matter to you?
Boston's broader tax debate is part of why buyers need careful numbers. Mayor Wu's plan to shift more tax burden onto commercial property was rejected by the state Senate on a 33-5 vote in January 2026, per NBC Boston. Some homeowners argue that even if commercial landlords pay more, the cost may still land on tenants through higher rents.
For you, the takeaway is simpler: broad structural relief for residential bills isn't on the near-term horizon, apart from targeted programs like the senior exemption. Build your offer around a realistic tax estimate, not a best-case one.
How should you run your number this week?
Three steps:
1. Find the condo's assessed value.
2. Divide by 1,000 and multiply by the residential rate.
3. Subtract the residential exemption if you'll live there and qualify — then add a cushion for rate and value increases.
Convert the annual number into a monthly one. That figure belongs right next to your mortgage payment, condo fee, insurance, and utilities.
This is how you find the real cost of owning the condo — not just the price on the listing.
If you're looking at a specific Boston condo, send over the address and price range, and I'll help you pressure-test the tax estimate before you write an offer.
