Yes, your landlord can ask for an additional security deposit, but the request is only valid if something about your tenancy has actually changed and if the new total stays under your state’s legal deposit cap. A rent increase at renewal, a new roommate on the lease, or adding a pet are the usual triggers. Without one of those changes, a mid-lease demand for more deposit money has no legal footing.
When the Request Is Legitimate
A landlord’s ability to ask for more deposit is tied to a real change in the rental arrangement. The most common trigger is a lease renewal with a rent increase. If your rent goes from $1,200 to $1,300 and your original deposit equaled one month’s rent, the landlord can ask for another $100 to keep the deposit aligned with the new rent.
Adding a roommate is another valid reason. An extra occupant increases the potential for wear on the unit, and the landlord can adjust the deposit to reflect that. The same goes for adopting a pet after signing a lease that didn’t allow one: expect a pet deposit or pet fee as a condition of permission.
The common thread is a modification to the lease itself. If nothing about the tenancy changes, there is no basis for asking you to pay more.
When the Request Crosses the Line
A landlord who demands more deposit in the middle of a fixed-term lease, with no change in rent, occupants, or lease terms, is making an improper request. You agreed to specific terms when you signed, and the landlord cannot rewrite the financial side of the deal because they would feel more comfortable holding a bigger cushion.
Any request that would push your total deposit above the state cap is unlawful on its face, even if the reason sounds reasonable. If you are already at the maximum and the landlord wants more for a new pet, the law will not allow it regardless of how the charge is labeled.
Deposit increases motivated by discrimination are illegal under federal law. The Fair Housing Act makes it unlawful to impose different terms or conditions on a tenant because of race, color, religion, sex, national origin, familial status, or disability.1Office of the Law Revision Counsel. 42 USC 3604 – Discrimination in the Sale or Rental of Housing and Other Prohibited Practices A landlord who charges a family with children a higher deposit than a single adult, or who raises the deposit after learning a tenant’s ethnicity, is violating that law.
Retaliation is also off-limits. If you reported a code violation or asked for a legally required repair and the landlord responded by demanding more money, that is retaliation, not a legitimate deposit adjustment.
The State Cap on Total Deposit Held
Most states limit security deposits to somewhere between one and three months’ rent, with one to two months being the common range. A handful of states set no statutory cap at all. Where a cap exists, it applies to the total amount the landlord holds at any given time, not to each charge separately. Your original deposit, any pet deposit, and any later increase all count toward the same maximum.
So if you pay $1,500 a month in a state with a two-month cap, the landlord can never hold more than $3,000 from you, no matter how many separate “deposits” they try to collect. Some states adjust the cap for specific circumstances. Furnished units sometimes allow a higher deposit than unfurnished ones, and a few states set lower caps for older tenants. Your state’s landlord-tenant statute is the only source for the exact number that applies to you.
Assistance Animals Are Not Pets
If the additional deposit is being requested because of a service animal or an emotional support animal, the request itself is improper. Under the Fair Housing Act, landlords must make reasonable accommodations for tenants with disabilities, and that includes waiving pet-related deposits and fees for assistance animals.2Office of the Law Revision Counsel. 42 USC 3604 – Discrimination in the Sale or Rental of Housing and Other Prohibited Practices – Section: 3604(f) HUD has stated explicitly that housing providers “may not exclude or charge a fee or deposit for assistance animals.”3U.S. Department of Housing and Urban Development (HUD). Fact Sheet on HUD’s Assistance Animals Notice
A service dog is not a pet, and neither is an emotional support animal with proper documentation. The landlord cannot charge a pet deposit, a pet fee, or monthly pet rent for that animal, and cannot apply breed, weight, or size restrictions that would otherwise apply to pets. They can still hold you responsible for actual damage the animal causes, the same way they would for damage caused by anyone else.
Pet Deposits, Pet Fees, and Pet Rent
For ordinary pets, landlords use three different tools, and the differences affect both what you pay and how the cap applies:
- A pet deposit is a one-time refundable payment that works like a standard security deposit but covers only pet-related damage. Typical amounts run from $100 to $600.
- A pet fee is a one-time, non-refundable charge for the general privilege of keeping a pet. Common amounts are $250 to $500.
- Pet rent is a recurring monthly charge on top of your regular rent, usually $25 to $50 per pet.
Not all of these are legal everywhere. Some states prohibit non-refundable fees or require that anything called a “deposit” be refundable. A refundable pet deposit usually counts toward the state’s overall deposit cap; a non-refundable pet fee may not, depending on the jurisdiction. If a landlord asks for a pet deposit mid-lease, add it to what they already hold and check the total against the cap before you pay.
How to Respond to the Request
Check two things first: your lease and your state’s landlord-tenant law. The lease will tell you the original deposit terms and whether it allows increases. The state law will tell you the maximum deposit allowed and any restrictions on when increases can happen. If the request falls within both, it is legitimate, and refusing could put you in breach of a renewed lease.
When the request is valid, handle it formally. Insist on a written lease addendum that states the new total deposit amount, the reason for the increase, and the date. Do not hand over additional money based on a verbal agreement. That addendum protects you and prevents a later dispute about how much deposit the landlord actually holds.
If the request appears illegal, respond in writing. A short, factual email stating that you believe the request exceeds the legal deposit limit or lacks a valid basis under your current lease is enough. Keep it neutral, and keep copies of everything. If the landlord threatens eviction or takes adverse action after you decline, that likely counts as retaliation, which is prohibited under most state landlord-tenant laws and under the Fair Housing Act.4U.S. Department of Housing and Urban Development (HUD). Housing Discrimination Under the Fair Housing Act Contact a local tenant rights organization or your state’s housing agency if the situation escalates.