Search "service dog requirements" and you'll land on registries selling certificates, vests with official-looking patches, and training programs promising a "legal" service dog. Almost none of it is required by law. The real requirements fit in two sentences. The rest of this guide explains what those sentences mean in everyday situations, what people wrongly assume is required, and what you're actually on the hook for once your dog qualifies.
Everything here is the federal rule, which applies in all 50 states. Many states add more on top, like public access for dogs still in training and fines for people who fake a service dog. Those are in our 50-state service dog law guide.
The Definition, in Plain English
The ADA's rule says a service animal is any dog that has been individually trained to do work or perform tasks for a person with a disability, and it names physical, sensory, psychiatric, intellectual, and other mental disabilities. Here's the exact wording, because people will argue with you about it:
That's from the Department of Justice regulation, 28 C.F.R. § 36.104. The same rule says comfort, companionship, and scaring off crime don't count as work or tasks.
So the test has exactly two parts. Let's take them one at a time.
Part 1: You Have a Disability
The ADA counts a disability as a physical or mental condition that substantially limits a major life activity: walking, seeing, hearing, breathing, sleeping, concentrating, or how a major body system works. It's a broad definition on purpose.
Three things people get wrong here:
- It doesn't have to show. PTSD, panic disorder, epilepsy, diabetes, autism, and hearing loss all qualify when they seriously limit your life. The rule names psychiatric disabilities by name.
- You don't need a note to walk into a store. Nobody at a business can ask what your disability is or ask for medical paperwork. (Housing and work are different, and we cover that below.)
- The dog has to be working for the person with the disability. If you're walking your sister's service dog while she's at home, it's a pet in that moment.
Part 2: Your Dog Is Trained to Do Something About It
This is the part that does the real work. Your dog has to be trained to take a specific action when you need it, and that action has to connect to your disability. The Department of Justice's own examples:
- Guiding someone who is blind or has low vision
- Alerting someone who is deaf to sounds
- Pulling a wheelchair or steadying someone who loses balance
- Warning of a seizure, or getting help and breaking a fall when one happens
- Alerting a diabetic to a dangerous blood sugar swing
- Reminding someone to take medication
- Noticing an anxiety attack starting and doing something trained about it: pressing against the person, leading them outside, interrupting a harmful habit
- Picking up dropped items, opening doors, or turning on lights for someone with limited mobility
The line is between doing something and being something. A dog whose presence calms you down is giving comfort, and the rule says that's not a task. A dog trained to spot the signs of a panic attack and respond with a specific behavior is doing a task. Same dog, same love, different legal status. It all comes down to whether you trained it to act.
What You DON'T Need (the Myths, Sorted)
This is the part most people are really searching for. None of the following is required for your dog to be a service dog or for you to bring it into a business:
| People assume you need | Reality |
|---|---|
| Certification | No. No government certifies service dogs. Any "certificate" you can buy is a private product with no legal weight. |
| Registration | No. There is no official registry. Online registries are private databases that sell a feeling. Here's how they work. |
| ID card | No. A business can't demand one. Plenty of handlers carry one anyway because it ends arguments faster than a legal citation. More on that here. |
| Vest, harness, or patch | No. The rule says so directly. Some handlers use a vest because it stops the questions before they start. Your choice. |
| Professional training | No. Train your own dog or hire anyone you like. |
| A set number of training hours or a public access test | No law sets a number. Trainer groups publish voluntary benchmarks (below), and they're worth using, but they're not law. |
| A doctor's letter | Not for public places. Landlords and employers can ask for one when your disability isn't obvious, under different laws. |
| A certain breed, size, or age | No. Breed bans don't apply to service dogs. Nobody can turn your dog away for being a pit bull or being big. |
| A dog license exemption | Not covered by the ADA. Your city's licensing rules still apply, though many cities and counties waive the fee for service dogs. |
If a store, a landlord, or a website tells you any of these is mandatory, they're either misinformed or selling something.
What You DO Have to Do
The right to bring your dog anywhere comes with a short list of responsibilities. These are the things a business can legitimately hold you to.
Keep the dog under control
Leash, harness, or tether, unless your disability makes that impossible or it would get in the way of the dog's work. In that case you control the dog with voice, signals, or whatever works. "Under control" means no lunging, no jumping on people, no wandering off, and no barking that doesn't stop.
Keep the dog housebroken
A dog that isn't housebroken can be asked to leave. It's one of only two reasons a business can use.
Take care of your own dog
No business has to feed, walk, or clean up after your dog. A hospital doesn't have to look after a patient's service dog.
If your dog is asked to leave, you still get served
When a dog is legitimately asked out for being out of control or not housebroken, the business still has to serve you without the dog. They can't use the dog as an excuse to turn you away entirely.
Our guide to what "under control" really means goes into barking, lunging, and the one-warning question.
The Two Questions
When it isn't obvious what your dog does, staff can ask exactly two things:
2. What work or task has the dog been trained to perform?
That's it. They can't ask what your disability is, ask for paperwork or an ID, or ask the dog to show them the task. If your dog's job is obvious, say a guide dog with someone who is blind, they can't even ask these two.
When someone pushes past the two questions, our guide on what to do when a business denies your service dog walks you through the moment, and our complaint guide covers what to do afterward, federal and state.
Where These Rules Apply, and Where They Don't
The ADA rules above cover businesses open to the public (restaurants, stores, hotels, theaters, hospitals, gyms, taxis and rideshares, most schools) and state and local government (city hall, the DMV, public transit, public schools). Four places play by different rules:
- Airplanes. A different law, the Air Carrier Access Act. Airlines can require a DOT form, and emotional support animals lost their status in 2021. See flying with a service dog.
- Housing. The Fair Housing Act is broader. It covers emotional support animals too, lets a landlord ask for documentation when your disability isn't obvious, and bans pet fees and pet deposits for assistance animals.
- Work. Bringing your dog to your job is a reasonable accommodation request. Your employer looks at it case by case and can ask for documentation.
- Churches and private clubs. Exempt from the federal rule, though many states cover them anyway.
The Excuses That Don't Work
- "There's a pet fee." Not for a service dog. They can charge you for damage your dog actually causes, if they'd charge anyone else for the same damage.
- "Someone here is allergic" or "I'm afraid of dogs." Not a reason to deny you. If someone's allergic, both of you get accommodated, like seating you apart.
- "No pets," "health code," "the kitchen is right there." None of these override the ADA. The only health-based no-go areas are truly sterile spaces like an operating room or a burn unit.
- "You can sit outside." No. They can't stick every handler on the patio or in the back.
Service Dog vs. Emotional Support Animal vs. Therapy Dog vs. Psychiatric Service Dog
| Type | Trained task? | Public places (ADA) | Housing (FHA) | Airplanes (ACAA) |
|---|---|---|---|---|
| Service dog | Yes, tied to a disability | Yes | Yes | Yes, with DOT form |
| Psychiatric service dog | Yes, for a psychiatric disability | Yes | Yes | Yes, with DOT form |
| Emotional support animal | No, comfort by presence | No | Yes | No, since 2021 |
| Therapy dog | Trained to comfort other people | No | No | No |
The one people miss most: a psychiatric service dog is a service dog, full stop. What makes it one is the trained task, not the kind of disability. Our service dog vs. ESA guide goes deeper.
How Much Training Is Enough?
The law doesn't give a number, so handlers and trainers use two well-known benchmarks:
- IAADP's minimum standards: about 120 hours of training over six months or more, with at least 30 of those hours out in public, plus solid obedience and task training.
- Assistance Dogs International's public access test: how the dog handles distractions, cars, doorways, restaurants, other dogs, and strangers.
Neither is law. Both describe what "under control" looks like in the real world. If you're training your own dog, these are the targets to aim for, because a dog that would fail them is a dog that can be asked to leave.
What Your State Adds
States can give you more rights, never fewer. The big additions:
- Dogs in training. The ADA gives them no access rights. Most states do, often only with a trainer from a recognized program.
- Penalties for fakers. About 34 states make it an offense to pass off a pet as a service dog, with fines from $100 to $1,000 and jail time in a few.
- Money for being denied. The federal law gets you an order and legal fees, not cash. State laws are where damages come from. California's Unruh Act, for example, starts at $4,000 per denial.
- Protection for the dog. Many states make it a crime to interfere with, harass, or injure a service dog.
Your state's rules, with the actual statute names, are in the service dog laws by state guide.
Does Your Dog Qualify? Six Questions
- Do you have a physical or mental condition that seriously limits a major part of daily life?
- Has your dog been trained to do at least one specific thing that helps with it?
- Does the dog do that thing reliably, not just at home?
- Is the dog housebroken?
- Does the dog stay under control in public? No lunging, jumping, wandering, or nonstop barking?
- Is the dog on a leash, harness, or tether unless that gets in the way of its job?
Six yeses and your dog is a service dog under federal law, today. No paperwork changes that answer in either direction.
The Bottom Line
The requirements are simple on purpose: a dog, trained to do a job for a person with a disability, kept under control and housebroken. Everything sold to you as "required," from certificates to registrations to vests, is optional. Some of it helps you avoid arguments. None of it is law.
Put your effort where the law actually looks: the training, the task, and how your dog behaves in public. That's what makes the dog a service dog, and it's the only thing a business is allowed to judge.