Start with the numerator and the denominator
MOD voluntary outflow is a specifically defined measure of relevant trained Royal Navy/Marines and RAF personnel and trade-trained British Army personnel voluntarily leaving before their agreed engagement or commission ends. The denominator is the corresponding average trained or trade-trained strength over the reporting window.
It is therefore not a direct percentage of all recruits who leave, an applicant failure rate or the full set of Regular Forces departures. Without that definition the attractive phrase 'military retention rate' can mislead.
Voluntary exits differ from total departures
Total UK Regular Forces outflow includes more types of departure than trained voluntary outflow. In the June 2026 window the official headline reports 13,050 total UK Regular outflow and 5,800 voluntary trained/trade-trained outflow, but the two measures do not share an identical underlying eligible population.
It would be incorrect to subtract one percentage from another to conclude how many personnel left for medical or disciplinary reasons. We need the appropriate detailed categories and denominators first.
What the recent history shows
The official published voluntary outflow rate in twelve-month reporting windows was 3.8% for June 2021, 6.5% for June 2023 and 4.8% for June 2026. The 2026 service rates were 4.7% Navy/Marines, 5.0% Army and 4.2% RAF. These are observations, not causal explanations or identical occupational risks.
Do not compare a March financial-year rate with the June-ended twelve-month rate as if it were the same measure. Each statistic must carry its date, trained definition, and source.
Research the reasons for departures carefully
Family life, career progression, housing, pay and the experience of service may influence people's decisions, but aggregate annual exit rates cannot identify which consideration caused a particular departure. The Armed Forces Continuous Attitude Survey offers complementary evidence about experiences and expressed intentions.
A survey of serving respondents is not a census of everyone who exited. Sample selection, response patterns, rank, service and the survey question's wording matter before correlating those responses with departure figures.
What a reliable retention report should publish
Separate total outflow from voluntary outflow, report the correct defined trained population, and provide the relevant source publication and reporting dates. Preserve official rounding discrepancies rather than silently rewriting them.
Our seven-year retention data can be downloaded in JSON and CSV, with each official source attached. The analysis is independent of MOD and makes no promise about an individual candidate's long-term satisfaction or selection success.
Try a relevant calculator or general practice exercise when it helps clarify this topic. No account, payment or official recruitment score is involved.
- Inspect MOD voluntary-outflow percentages by service ↗
Seven separately defined yearly rates; not a personal retention probability.
These related independent guides explore other stages of the same pathway.
- UK Military Recruitment Trends 2020–2026: Joiners and Leavers
- Military Acceptance Rates: Why Applicants and Entrants Cannot Be Divided
- UK Armed Forces Strength Since 2000: Reading the MOD Annual Means
- Army Cognitive Test Verifier: How to Review Reasoning Mistakes
- British Army Fitness Test: 2km Run and Officer Standards
When an official benchmark for your exact role and stage is available, the free fitness comparison explains one numerical result. It is not an overall selection prediction.
Open the free comparison ↗Review the original page, especially before acting on dates, assessment stages or specific physical standards.
Public references examined in October 2026. This article is independent and may not reflect a later official change.