The Auto-Enrolment Adequacy Gap
Auto-enrolment solved participation but left contribution levels dangerously low.
Auto-enrolment was a genuine policy triumph: it reversed a decade-long decline in pension participation by making it hard to opt out rather than hard to join. Millions of workers who would never have started a pension were quietly enrolled, and participation rates recovered. McPhail is clear: 'Great big tick job done. Well done guys.' But that success masks a dangerous complacency — the amount people are actually saving is 'way below what is adequate.'
The default auto-enrolment rate sits at 8% of qualifying earnings (3% employer, 5% employee including tax relief). This sounds meaningful until you factor in that qualifying earnings strip out the first ~£6,000 of salary, the contribution only applies to earnings up to ~£50,000, and 8% of mid-range earnings over a working life will not fund a comfortable retirement without additional saving. The self-employed — a growing and structurally excluded cohort — receive nothing from the system at all.
The framework defines two distinct problems that are routinely conflated: participation (are you in a pension?) and adequacy (is enough money going in?). Solving the first without the second creates a false sense of security. Workers who check the box of 'yes, I have a pension' may be systematically under-saving while believing they are on track. McPhail's diagnosis is that policymakers, employers, and individuals all conflate the two — and the coming population age shift will expose that confusion brutally.
- Participation in a pension scheme and saving enough for retirement are separate problems requiring separate solutions.
- The auto-enrolment default rate was calibrated to minimise opt-outs, not to deliver adequate retirement income.
- The self-employed are systematically excluded from auto-enrolment and face the largest adequacy gap.
- Small technical improvements that have been legislated but not implemented represent the minimum bar, not the destination.
- Political difficulty scales with visibility: invisible changes (employer contributions) are easier to pass than visible ones (reduced take-home pay).
- Establish your current total contribution rateCalculate what percentage of your gross salary (not just qualifying earnings) is actually going into your pension. Include employer contributions and tax relief. Most people earning £35,000 with default auto-enrolment are saving around 5-6% of gross pay — far below the 15%+ that retirement income research typically recommends.Pro tipAsk HR for the full contribution structure — many employers only state the matched rate, not the qualifying earnings base, which understates the real gap.WarningThe quoted '8% contribution' applies only to the qualifying earnings band, not your full salary. Your effective rate may be materially lower.
- Identify your adequacy targetA rough rule of thumb is that total pension contributions (employer + employee) should be at least 12-15% of gross salary across a full working life to fund a retirement income of ~50-60% of working income. Compare your current rate against this benchmark and identify the shortfall.WarningIf you are self-employed, you have no employer contribution and must fund the full rate yourself — your adequacy gap is almost certainly the largest in any cohort.
- Close the gap through salary sacrifice or additional voluntary contributionsThe most efficient route to closing the adequacy gap is increasing contributions via salary sacrifice (if available), which avoids both income tax and National Insurance. Even a 1-2% increase in contributions started early compounds dramatically over a 30-40 year horizon.Pro tipSalary sacrifice is available to employees but not the self-employed; self-employed workers should use a SIPP and pay contributions from pre-tax profits via their accountant.
- Monitor and adjust as policy changesAuto-enrolment thresholds, contribution minimums, and tax relief rules are actively under review. The current pensions commission may recommend increasing mandatory contribution rates materially. Track any changes and treat any mandatory rate increase as a floor to exceed, not a target to hit.WarningDo not assume that if the government raises the auto-enrolment rate, you will then be saving 'enough' — the new rate will still likely be below what is needed for a comfortable retirement.
The 2012 auto-enrolment rollout reversed two decades of declining pension participation and got millions of workers back into pensions. But the default contribution rate was set at 4% (rising to 8%) of qualifying earnings — a level chosen for its low opt-out rate, not its adequacy. A 2017 review identified sensible improvements but they were still unimplemented by 2025.
McPhail points to a cohort of self-employed workers — many living in communities without a strong savings culture — who are entirely outside auto-enrolment. They have no employer contribution, no default enrolment nudge, and often face irregular income that makes regular pension contributions difficult. The pensions commission explicitly flagged certain ethnic communities and genders as structurally underserved.
Public sector workers receive pension contributions averaging approximately 25% of pay — roughly four times the private sector average of 6-7%. This disparity is funded from general taxation. McPhail frames this as the 'most egregious' inconsistency in the system — one that receives almost no public scrutiny.
McPhail traces the adequacy gap to the original design of auto-enrolment, which emerged from the Pensions Commission of the early 2000s. The commission's priority was reversing the collapse in participation — a binary problem with a binary solution. The contribution rate was set low deliberately to minimise opt-outs, on the theory that getting people in was the first battle. A 2017 independent review identified sensible changes to widen the earnings definition and lower the enrolment age, but even those modest technical fixes had still not been implemented by the time of this episode. The political will to raise contribution rates — which would visibly reduce take-home pay — has proven elusive at every stage.