The Boston security deposit demand letter that gets deposits back.
Massachusetts law gave your Boston landlord 30 days to return it or itemize. If that clock has run, a Boston security deposit demand letter puts Mass. Gen. Laws ch. 186 to work on your side.
Last updated September 2026 · local figures: U.S. Census ACS 2024 5-year
| Median rent in Boston | $2,147/mo |
| Typical deposit ≈ one month | ≈$2,100 |
| Statutory 3× on wrongful withholding | $6,300 |
| Landlord's potential exposure | $6,300 |
Median gross rent: U.S. Census Bureau, ACS 2024 5-year (table B25064). Deposit example rounded to one month's rent; statutory figures are ceilings, and courts decide actual awards.
Boston deposit law at a glance
The law that protects your deposit
Deposits in Boston are governed by Massachusetts state law: Mass. Gen. Laws ch. 186, § 15B. Violations can make the landlord liable for treble the deposit plus 5% interest, court costs, and attorney's fees; the deposit must be held in a separate Massachusetts bank account and receipted. Full Massachusetts deadline & penalty guide →
The court that would hear it
Deposit claims from Boston are filed in the Small Claims session (District Court or Boston Municipal Court) serving Suffolk County, a court designed for people without lawyers, hearing claims up to $7,000. Statutory treble-damage deposit awards may be pursued even above the base limit. A typical Boston deposit, even at the statute's $6,300 cap, fits under that limit, which is exactly why a statute-citing certified letter usually settles it first.
What you get for $20
Nothing is charged until you have read the letter that will be sent. After you sign it, we handle the printing, the postage and the trip to the Post Office, and you keep the certified tracking, the delivery record and a signed copy you can check against its own fingerprint.
How it works covers every step, and what it costs to do the same thing alone.
The bit that stops them arguing
Not a logo that says “verified.” A short record of how and when you signed, printed on the letter your Boston landlord is holding, plus a code made from the letter's own words.
- Tap to explain
- The demand paragraph
- The signature record
- The SHA-256 hash
- Certified Mail with Return Receipt
Signature method: drawn by the signer on screen. Signed: August 30, 2026 at 4:12 PM CDT Document hash (SHA-256): 4a7f2c91e0b8d35a6c14f9027be3d8815c0a6f4392db77e1a05c8b3e6f19d24c Signed from IP 203.0.113.24 Browser: Mozilla/5.0 (Windows NT 10.0; Win64; x64) Consent to sign electronically was recorded at the time of signing. Mailed USPS Certified Mail on 2026-08-31, article no. 9407 3000 0000 0000 0000 00.
The closing words above are the real ones our engine writes for Boston letters, statute and deadline included. The name, signature and codes are made up; yours carry your own record. The time is shown in the signer's own time zone, not ours.
That code is built from every word in your letter. Change one word and it no longer matches. Type it into our checker and it tells you the letter is the same one you signed. Run the example code through the checker →
What happened to Massachusetts renters who sent one
Reported by the renter after their landlord's window closed, and published only where they agreed to it. Amounts are what they told us came back. We never publish a full name, an address, or a screenshot. Results vary and no outcome is guaranteed.
What a Boston deposit is usually worth
Median gross rent in Boston runs about $2,147 a month (ACS 2024 5-year). Where a deposit is set around one month’s rent, that is the ballpark figure at stake. That is about 22% above the Massachusetts median of $1,762, which means deposits here run larger than the statewide picture suggests, and so does what you lose by writing one off.
More renters than owners live in Boston: about 64% of households, some 182,208 of them, rent. In a majority-renter city, deposit disputes are not an edge case; they are a routine feature of the housing market, and local courts see them constantly. The rule that governs what happens to that money is set at the state level, by Mass. Gen. Laws ch. 186, § 15B, and it applies in Boston exactly as it does anywhere else in Massachusetts.
Renters underestimate how much the format matters. The same request, made by text, gets filed under “annoyance”; made by certified letter citing the statute and the deadline, it gets filed under “risk”. The money at stake did not change. The category did.
Leaving a Boston rental without losing the deposit
In a city this size the deposit is rarely sitting in one person’s account. It has been folded into an operation with a process, and processes respond to documents far better than they respond to phone calls.
- Do a final photo pass at handover. Every room, every surface, and the meter readings. Keep the originals: their embedded timestamps are what make them evidence rather than pictures.
- Give the forwarding address in writing and keep the proof. This is the single most common way a good claim fails, in every city and every state.
- Check the name on your lease against who you have been emailing. They frequently differ in a market this size, and only one of them is the right recipient.
- Act once the window has gone. After 30 days you are not being pushy, you are being timely, and every further month weakens what you can prove.
Where a Boston renter would actually file
A landlord reading your letter is silently sizing up one thing: does this person actually know what happens next? It costs you five minutes to be someone who does.
Massachusetts routes deposit claims to the Small Claims session (District Court or Boston Municipal Court), with a limit of $7,000. For a rental in Boston, that normally means the court serving Suffolk County. Filing fees and procedure are set by the court. The Massachusetts judiciary publishes its own small claims instructions and forms, which is the page to read before you file.
Filing fees are typically a small fraction of a deposit, and the process is designed for people representing themselves. What decides it is paperwork: the lease, dated photographs, proof of your forwarding address, and a demand letter you can prove arrived.
Boston renters, by the numbers
Sources: U.S. Census Bureau, ACS 2024 5-year, tables B25064 & B25003 (Boston; Census place “Boston city”); Mass. Gen. Laws ch. 186, § 15B. Population ≈666,000.
Boston deposit questions
How long does a landlord in Boston have to return a security deposit?
Can I sue my landlord in small claims court in Boston?
Is a demand letter worth it for a typical Boston deposit?
General legal information, not legal advice. Court limits and city ordinances change; verify current rules or consult a licensed Massachusetts attorney.
What to settle before you write to them
Deposit law here comes from the state. What varies is which of these four questions your own dispute turns on, so it is worth knowing before you write to anyone.
For one charge in particular:
Or run the whole list through the deduction checker for Boston renters.
Before you send it
All of this is on the site already, at no charge.
- See an example security deposit letter, annotated before you write a word of your own.
- Then run your own numbers on the deposit calculator, using the deposit you actually paid.
- Read the statute, the deadline and the penalty for Massachusetts, the layer of law above Boston.
- If the letter does not work, read how Massachusetts small claims court actually works.
- Curious where you stand? See Massachusetts on the Security Deposit Penalty Index.
- Check interest on a Massachusetts security deposit. Almost nobody asks for it.
Not renting in Boston any more? We send the same security deposit demand letter Boston, Massachusetts renters send in all 50 states and the District of Columbia, each built on that state's own statute.
Help that costs nothing, Boston and statewide
Deposit law is set in Massachusetts, but the office you would call and the court you would file in are closer to home. These are the ones that matter for Boston.
- MassLegalHelp Free and low-cost civil legal help for Massachusetts renters, including housing and deposit questions.
- Massachusetts Small Claims session (District Court or Boston Municipal Court) The state judiciary's own small claims instructions and forms. Claims up to $7,000.
Government and nonprofit resources, listed because they are useful. We are not affiliated with any of them, and none of them is affiliated with us. Every link here was checked on August 30, 2026.