There is no single lifespan that fits every dog. Large UK studies give useful context, but their numbers describe groups of dogs, not the time an individual has left. [1, 2]

Two studies, two different measures

Teng and colleagues analysed 30,563 deaths recorded through UK primary veterinary care. Their 2022 life tables estimated life expectancy at birth at 11.23 years. McMillan and colleagues used 584,734 UK dogs, including dogs still alive, from 18 organisations. Their 2024 study estimated median survival at 12.5 years. [1, 2]

Life expectancy is a mean, or average; median survival estimates the age by which half a population has died. The studies also sampled different populations and used different methods. Their figures should not be averaged together or read as evidence that dogs gained years of life between publication dates.

An older dog is not an average with years subtracted

A dog that has reached ten has already survived the risks of earlier life. In Teng’s all-dog life table, estimated average remaining life at age ten was 3.28 years, not 11.23 minus ten. These are the study’s group estimates: [1, Table 2]

• At age five: 7.02 further years.
• At age eight: 4.61 further years.
• At age ten: 3.28 further years.
• At age twelve: 2.23 further years.
• At age fourteen: 1.46 further years.

These are not promises, and they do not account for an individual dog’s current illness or quality of life. They are useful for understanding the possible commitment when adopting an older dog, not for deciding treatment or end-of-life care on their own.

Size, face shape and breed matter — with caveats

In the 2024 study, smaller purebred dogs tended to outlive larger ones. Flat-faced purebred groups had shorter median survival than medium-muzzled groups; size and face shape also interacted. These are associations, not proof of a single cause. The dataset did not include causes of death. [2]

Do not assume a crossbreed label guarantees a longer life. Studies use different crossbred populations, and grouping all crosses together hides their different ancestry. The 2024 authors explicitly said their results did not rule out hybrid vigour. [2]

Use the context, not a countdown

Breed estimates can be uncertain when few deaths are recorded. Rapid changes in breed popularity can also distort estimates by making a population unusually young. [1] Neither paper represents every UK dog. [1, 2] Your dog’s health, comfort and daily experience matter more to individual care than a league table.

If you notice changes in your dog’s appetite, weight, energy, mobility or comfort, or you are worried about their quality of life, talk to your vet. They can assess your dog as an individual, which no population average can do.

General information only, not a substitute for veterinary advice. This guide cannot assess your dog, predict how long an individual dog will live or replace advice from your vet.

Sources

1. Teng KT, Brodbelt DC, Pegram C, Church DB, O’Neill DG (2022). Life tables of annual life expectancy and mortality for companion dogs in the United Kingdom. Scientific Reports 12:6415. doi:10.1038/s41598-022-10341-6. Life-table analysis of UK primary-care veterinary records (VetCompass).
2. McMillan KM, Bielby J, Williams CL, Upjohn MM, Casey RA, Christley RM (2024). Longevity of companion dog breeds: those at risk from early death. Scientific Reports 14:531. doi:10.1038/s41598-023-50458-w. Corrected online version; Author Correction, Scientific Reports 14:8772, doi:10.1038/s41598-024-59331-w. Survival analysis of records pooled from 18 UK data sources.

Evidence checked 8 November 2026; citation details and key figures re-checked 12 November 2026. These sources inform the content; their authors have not reviewed or endorsed this article.