Boxer Dog Lifespan
A 2023 study of Boxers in UK vet practices found a median age at death of 10.46 years, with no difference between males and females. UK life tables give 10.0 years at birth.
Boxers usually live 10 to 12 years. The AKC lists 10–12 years, a 2024 study of 11,294 UK Boxers found a median of 11.3, and a separate UK study found 10.5. Heart disease and tumors are the main concerns, so screening and regular checkups matter for this breed.
Boxer life stages
Life stages follow the 2019 AAHA guidelines. The senior stage is the last 25% of expected life, so with a median lifespan of 11.3 years, a Boxer becomes a senior at about 8.5.
| Stage | Age | What to focus on |
|---|---|---|
| Puppy | 0–9 months | Ask the breeder for the parents’ heart screening results before you bring a puppy home. |
| Young adult | to 4 years | Start brushing teeth often; the AKC suggests daily if possible. |
| Mature adult | 4–8.5 years | Check the mouth and skin monthly for lumps; tumors are common in Boxers. |
| Senior | 8.5+ years | From about 8.5, see the vet twice a year and ask whether heart monitoring makes sense. |
Boxer age in human years
| Boxer age | Human years |
|---|---|
| 1 year | 15 |
| 2 years | 24 |
| 3 years | 28 |
| 4 years | 32 |
| 5 years | 36 |
| 6 years | 45 |
| 7 years | 50 |
| 8 years | 55 |
| 9 years | 61 |
| 10 years | 66 |
| 11 years | 72 |
| 12 years | 77 |
| 13 years | 82 |
| 14 years | 88 |
| 15 years | 93 |
| 16 years | 99 |
Boxer puppy growth (estimate)
| Age | Male (lb) |
|---|---|
| 2 months | 16–20 |
| 3 months | 23–28 |
| 4 months | 31–38 |
| 6 months | 47–58 |
| 9 months | 60–74 |
| 12 months | 64–79 |
| 18 months | 65–80 |
Common Boxer health problems
Cardiomyopathy
Heart muscle disease that can cause abnormal heart rhythms. The AKC lists cardiomyopathy among the breed’s health issues, and Boxer screening includes a DNA test for arrhythmogenic right ventricular cardiomyopathy (ARVC) and heart rhythm monitoring.
Watch for: Fainting, weakness, tiring quickly, fast or irregular breathing.
If your Boxer faints or collapses, even if they recover quickly, see a vet promptly.
Aortic stenosis
A narrowing at or below the heart’s main outflow valve that makes the heart work harder. Responsible breeders screen for it, according to the AKC.
Watch for: A heart murmur found at a checkup, low stamina, fainting.
Tumors and cancer
Neoplasia was the second most common group of problems in UK Boxers (14.2% in a year) and caused 12.4% of deaths. The AKC notes breeders screen for certain cancers.
Watch for: New or growing lumps on the skin, in the mouth or anywhere on the body.
Epulis and eye ulcers
Epulis, a growth on the gums, was the second most common single diagnosis (5.8%), and corneal ulceration, a sore on the surface of the eye, affected 5.0% of UK Boxers in a year.
Watch for: A lump on the gums, a squinting or watering eye.
Thyroid deficiency and degenerative myelopathy
The AKC lists hypothyroidism and degenerative myelopathy, a spinal cord disease that weakens the hind legs in older dogs, among conditions breeders screen for.
Watch for: Weight gain, low energy, coat changes; scuffing or wobbling back legs.
Boxer heart disease and screening
Heart disease is the health issue most associated with Boxers. The AKC lists cardiomyopathy and aortic stenosis among the conditions responsible breeders screen for, and Boxers have one of the longest lists of recommended health tests of any breed we cover: hips and elbows, thyroid, heart evaluations for aortic and subaortic stenosis, a DNA test for arrhythmogenic right ventricular cardiomyopathy (ARVC), heart rhythm monitoring and a degenerative myelopathy test.
For owners, that has two practical meanings. When choosing a puppy, ask to see the parents’ heart screening results. And once your Boxer is an adult, mention any fainting, weakness or unusual tiredness to your vet, even if it seems minor or passes quickly.
How to help your Boxer live longer
Screen the heart
Ask your vet whether rhythm monitoring or other heart tests are right for your Boxer, especially if a parent had heart disease or your dog has ever fainted.
Do a monthly lump check
Feel over your Boxer’s body and look inside the mouth once a month. Tumors are among the breed’s most common problems, so new lumps are worth showing to your vet.
Brush teeth often
The AKC recommends brushing a Boxer’s teeth often, daily if possible, to prevent tartar build-up.
Protect them from heat and cold
Boxers don’t tolerate extreme heat or cold well, according to the AKC, so keep outdoor exercise to comfortable temperatures.
Keep your Boxer lean
In US records, the heaviest dogs had a life expectancy of 11.7 years, compared with 13.2 at an ideal weight.
Boxers and tumors
In a 2023 study of 3,219 Boxers in UK vet practices, neoplasia (tumors) was the second most common group of problems, recorded in 14.2% of the dogs in a single year, and caused 12.4% of deaths. Epulis, a growth on the gums, was one of the most common individual diagnoses.
Not every lump is cancer, and only a vet can tell. But because tumors are so common in Boxers, a habit of checking the skin and mouth every month, and showing any new lump to your vet, is one of the most useful things an owner can do.
Frequently asked questions
How long do Boxers live?
Usually 10 to 12 years. The AKC lists 10–12 years, and UK studies found medians of 11.3 and 10.46 years.
What is Boxer cardiomyopathy (ARVC)?
A heart muscle disease that can cause irregular heart rhythms and fainting. Boxer screening includes a DNA test for ARVC and heart rhythm monitoring; ask breeders and your vet about both.
Do male or female Boxers live longer?
There was no difference in a 2023 UK study of Boxers: median age at death did not differ between males and females.
What is epulis?
A growth on the gums. It was one of the most common diagnoses in UK Boxers, recorded in 5.8% in a year. Your vet can check any lump in the mouth.
Do white Boxers have more health problems?
In the 2023 UK study, white Boxers (about 11% of the breed) did not differ from other Boxers in lifespan or in the 34 most common individual disorders, though they had more dental and brain disorders as groups.
Is 9 old for a Boxer?
Yes. With a median lifespan of 11.3 years, the senior stage by AAHA’s definition begins at about 8.5. On the AKC chart for large dogs, a 9-year-old is about 61 in human years.
Compare similar breeds
Sources
- American Kennel Club. Boxer breed information.
- McMillan K.M. et al. Longevity of companion dog breeds: those at risk from early death. Scientific Reports, 2024.
- O'Neill D.G. et al. Demography, common disorders and mortality of Boxer dogs under primary veterinary care in the UK. Canine Medicine and Genetics, 2023.
- Teng K.T. et al. Life tables of annual life expectancy and mortality for companion dogs in the United Kingdom. Scientific Reports, 2022.
- Montoya M. et al. Life Expectancy Tables for Dogs and Cats Derived from Clinical Data. Frontiers in Veterinary Science, 2023.
- Creevy K.E. et al. 2019 AAHA Canine Life Stage Guidelines. JAAHA, 2019.
Estimates only — not a substitute for veterinary advice. Read our disclaimer.