Pet Deposit Laws in Massachusetts: What Landlords Can and Can’t Charge
November 4, 2026
Pet deposit laws in Massachusetts are stricter than in almost any other state, and many renters and landlords still get them wrong. A listing may advertise a “$300 pet deposit,” but under state law that charge is generally not one a landlord can collect. LeaseRunner’s Massachusetts guide puts the rule plainly: you can be charged monthly pet rent, but not an extra pet deposit.
This article walks through what a pet deposit is, why the state bans it, and how pet rent, pet fees, and security deposits fit together. It also covers assistance animals, deductions, return deadlines, and what you can do if a landlord asks for money the law does not allow. The goal is to give you a practical, even-handed picture whether you rent or own rental property.
Important Note: This article is general information, not legal advice. Housing rules can change and individual situations vary, so consider contacting Housing Court, a local legal aid office, or a Massachusetts attorney for your specific dispute.
What Is a Pet Deposit in Massachusetts?
A pet deposit is a refundable sum a landlord collects on top of the regular security deposit to cover possible pet damage. In many states it is a routine part of renting with a dog or cat. Massachusetts treats it differently because the state security deposit statute sharply limits what a landlord can collect before a tenancy starts.
Massachusetts has no standalone pet statute. The money rules come from Massachusetts General Laws chapter 186, section 15B, which lists the only charges allowed at or before move-in. If a pet-related charge is not on that list, it does not belong in your lease.
Does Massachusetts Allow Landlords to Charge a Pet Deposit?
No. Attorney Andrew Lynn’s guide to landlord fees states that Massachusetts law permits neither a “rental deposit” nor a “pet deposit.” The statute allows a short list of upfront payments, and a pet deposit is not among them.
A private landlord may still set a no-pet policy or restrict certain animals. Massachusetts law does not require most landlords to accept pets. What the landlord cannot do is accept your pet in exchange for an extra deposit.
If you want background on the broader picture, our guide to whether landlords can ban pets in Massachusetts explains where no-pet rules are enforceable and where they are not.
Maximum Pet Deposit in Massachusetts
The maximum pet deposit in Massachusetts is effectively zero. The most a landlord can hold as a security deposit is one month’s rent, and that cap applies whether or not you have an animal. As Practical Landlord’s 2026 summary notes, there is no pet-deposit add-on and no two-month deposit for higher-risk tenants.
If your rent is $2,400, the legal security deposit is at most $2,400, with or without a dog. A landlord who asks for $2,700 because you have a pet is asking for more than the statute allows.
Does a Pet Deposit Count Toward Massachusetts’s Security Deposit Limit?
Yes, in effect. Any money a landlord holds as security against damage counts toward the single one-month limit. A pet-related “deposit” that pushes the total above one month’s rent is over the cap, and one that fits under the cap is simply part of your ordinary security deposit.
The cap is separate from the other permitted payments. According to LeaseRunner, first and last month’s rent are prepayments of rent, not part of the one-month deposit cap. Here is what a landlord can collect at move-in:
| Upfront Payment | Allowed? | Limit |
|---|---|---|
| First month’s rent | Yes | One month |
| Last month’s rent | Yes | One month |
| Security deposit | Yes | No more than one month’s rent |
| New lock and key | Yes | Actual cost |
| Separate pet deposit | No | Not on the statutory list |
Pet Deposit vs. Pet Fee vs. Pet Rent in Massachusetts
These three charges are often confused, but Massachusetts treats them very differently. A deposit is refundable money held for damage. A fee is a one-time charge, usually non-refundable. Rent is a recurring monthly charge.
Pet rent is the one that survives legal scrutiny. In the 2021 Appeals Court case Flemming v. Greystar Management Services, Drayton Law explains that the court held the security deposit statute does not prohibit landlords from charging animal rent. Here is how the three compare:
| Charge | What It Is | Status in Massachusetts |
|---|---|---|
| Pet deposit | Refundable lump sum held for damage | Not allowed beyond the one-month security deposit cap |
| Pet fee | One-time, usually non-refundable charge | Treated as an unlawful upfront charge by most sources |
| Pet rent | Monthly charge added to rent | Generally allowed if stated in the lease |
Important Note: Sources do not fully agree on pet fees. Some guides call a one-time pet fee “not explicitly regulated,” while others say the exclusive list in section 15B bars it. Because the statute limits upfront payments to a closed list, assume a one-time pet fee is risky and ask for legal guidance before paying one.
Are Pet Deposits Refundable in Massachusetts?
The question is mostly academic, since a separate pet deposit should not exist. What does exist is your regular security deposit, and it is refundable, minus lawful deductions. TenantScreeningBackgroundCheck’s 2026 overview says the landlord has thirty days after you surrender the unit and give a forwarding address to return the deposit with an itemized statement of deductions.
Massachusetts also requires the landlord to hold your deposit in a separate, interest-bearing account. If you have a pet and a damage claim arises, the landlord has to draw from that same refundable deposit.
Are Non-Refundable Pet Fees Legal in Massachusetts?
In most readings, no. StatuteWorks says a separate nonrefundable pet deposit or an upfront cleaning fee asks for money the statute does not permit. LeaseRunner likewise says Massachusetts does not allow non-refundable pet fees, since the law expects deposits to be refundable.
The gray area comes from commentary that calls one-time pet fees “not explicitly regulated.” In practice, a non-refundable payment collected at move-in functions like a prohibited extra charge. If you were charged one, you can ask the landlord to put it in writing and explain which part of section 15B allows it.
Can Landlords Charge a Pet Deposit for Service Animals and ESAs in Massachusetts?
No. Service animals and emotional support animals (ESAs) are not treated as pets for housing purposes. Federal and state fair housing law, including the Massachusetts Fair Housing Act in Chapter 151B, requires a landlord to grant a reasonable accommodation, and bars pet fees, deposits, and breed rules for a qualified assistance animal.
A landlord may ask for documentation of an ESA, such as a letter from a licensed mental health professional. Trained service animals generally do not require documentation by law. For the full process, see our guide to ESA housing laws in Massachusetts.
| Feature | Service Animal | Emotional Support Animal |
|---|---|---|
| Housing protection from no-pet clauses | Yes | Yes |
| Documentation typically required | None required by law | Letter from a licensed mental health professional |
| Landlord can charge a pet fee or deposit | No | No |
How Much Is a Typical Pet Deposit in Massachusetts?
There is no typical lawful pet deposit in Massachusetts, because the state does not allow one. You may still see listings from out-of-state management companies or older leases that advertise $200 to $500 deposits, which is common in other states. Treat any such number in a Massachusetts lease as a red flag, not a standard.
What you are more likely to see is monthly pet rent. The law sets no cap on that amount, so it varies by landlord and building. Read the lease carefully and compare the monthly figure against similar pet-friendly units before signing.
Can a Landlord Charge a Pet Deposit and Pet Rent Together in Massachusetts?
No. A landlord can charge pet rent, but cannot add a pet deposit alongside it. The Flemming decision approved monthly rent for an animal, not an upfront deposit on top of it, as LeaseRunner summarizes.
The pet rent also has to behave like rent. It should appear as part of your regular monthly payment and be stated in the lease, not billed as a one-time lump sum or held like a deposit.
Pro Tip: Look at the line items in your lease before signing. If a pet charge is described as a “deposit,” “fee,” or “move-in” payment, ask the landlord to restructure it as monthly rent or remove it.
Pet Deposits for Multiple Pets, Fish and Caged Pets in Massachusetts
The one-month cap does not grow with the number of animals. Whether you have one cat, three dogs, a tank of fish, or a hamster, the total security deposit stays at one month’s rent at most. A landlord cannot add a per-pet deposit for a second animal.
A landlord can still set lease rules, such as limiting the number or type of animals, or charging additional monthly rent per pet. Small caged animals and fish are usually less contentious, but the same rule applies: no extra upfront deposit. If you keep less common animals, our guides on backyard chicken laws and rooster laws cover local rules that may affect your lease or town bylaws.
What Can a Landlord Deduct From a Pet Deposit in Massachusetts?
Because a pet deposit is not allowed, deductions come out of your regular security deposit. According to Practical Landlord, deductions are limited to unpaid rent and water charges, lease-authorized tax increases, and damage beyond normal wear and tear.
Pet damage can qualify if it goes beyond normal wear. Examples include chewed trim, deep scratches in hardwood, or urine-stained subflooring. Ordinary wear, like light carpet matting, should not be deducted.
- The landlord must identify the damage in precise detail.
- The landlord must provide written evidence, such as bills, estimates, or receipts.
- The deduction must be limited to the reasonable cost of repair.
How Long Does a Landlord Have to Return a Pet Deposit in Massachusetts?
A landlord has 30 days after the tenancy ends to return your security deposit or provide an itemized list of deductions. Tellus’s landlord guide says a landlord who misses that deadline forfeits the right to keep any part of the deposit and may owe three times the deposit plus attorney fees.
Practical Landlord adds that the itemized statement must arrive within the same 30-day window, along with supporting evidence. To protect yourself, give your forwarding address in writing and keep a copy.
Can a Landlord Keep Your Pet Deposit Without Proof of Damage in Massachusetts?
No. Deductions require documentation. The statute calls for an itemized list in precise detail and written evidence, and StatuteWorks says tenants can recover three times the deposit plus 5% interest and attorney fees when a landlord keeps an amount the sworn statement does not support.
If your landlord holds back money for “pet odor” or “general cleaning” with no receipts or estimates, you can challenge it. Send a written demand letter, then consider Housing Court if the landlord does not respond.
The original source, Massachusetts Academy of Real Estate, adds that a landlord who wants to claim pet damage must supply evidence of the damage and the repair cost.
Can a Landlord Raise the Pet Deposit or Change the Pet Policy Mid-Lease in Massachusetts?
A landlord cannot raise a security deposit above one month’s rent at any point. Section 15B also bars demanding a deposit in excess of what the statute allows after a tenancy begins, as quoted in Drayton Law’s case summary. A mid-lease “pet deposit” demand is therefore doubly improper.
Changing pet rent or pet rules mid-lease is a different question. If you have a fixed-term lease, the terms generally stay locked until it ends unless you agree to a change. If you rent month to month, a landlord can usually change terms with proper written notice, though the notice rules are technical and worth checking with a tenant resource.
Can You Negotiate a Pet Deposit in Massachusetts?
You cannot negotiate a pet deposit that the law does not allow, and agreeing to one does not make it legal. A landlord who collects an unlawful charge can still face liability even if you signed. What you can negotiate is the monthly pet rent, the number of animals allowed, and whether the lease spells out pet-damage responsibility.
Here are practical ways to improve your position:
- Offer references from prior landlords or a vet’s record showing vaccinations. Our guide to pet vaccination laws in Massachusetts lists what is required.
- Ask for a lower monthly pet rent in exchange for a longer lease.
- Document the condition of the unit with dated photos at move-in.
- If a landlord insists on an illegal deposit, cite chapter 186, section 15B and ask for the charge in writing.
If a landlord will not back down, the tenant-rights.com guide suggests contacting the Department of Consumer Affairs and Business Regulation or the Housing Court. Breed rules are a separate issue, so see our pages on pit bull laws and American Bully laws if your dog is a restricted type. For other rules that affect pet owners, our overview of dog leash laws in Massachusetts is a useful next read.
In short, Massachusetts renters should expect no pet deposit, a one-month security deposit cap, and possibly monthly pet rent. If a lease asks for more than that up front, you have grounds to push back.