If your State Pension forecast looks lower than you expected given your years of work, "contracting out" is one of the most common — and least understood — explanations. Here's what it actually was, and why it still affects people's pensions today even though it ended in 2016.

What contracting out actually was

Between 1978 and 2016, employees could be "contracted out" of the Additional State Pension (also called SERPS, later the State Second Pension). This meant that instead of paying full-rate National Insurance and building up entitlement to the Additional State Pension, both employee and employer paid a reduced rate of NI, and the difference was paid instead into a workplace pension scheme, which took on the job of providing that part of the pension.

It was very common — many large employers automatically contracted their staff out through defined benefit workplace pension schemes for years or decades, often without employees paying much attention to the mechanics of it at the time.

Why your starting amount might look lower

When the new State Pension launched in April 2016, everyone's entitlement built up before that date was converted into a single "starting amount", calculated as the higher of what they'd have received under the old rules or the new rules, based on their NI record at that point. Because contracted-out periods meant lower NI contributions towards the Additional State Pension, they generally reduce the starting amount compared to someone who was never contracted out, even with an identical number of working years.

Situation
Typical effect on starting amount
Never contracted out
Starting amount reflects full NI and any Additional State Pension built up
Contracted out for part of career
Starting amount reduced to reflect the contracted-out period
Contracted out for most/all of career
Starting amount may sit noticeably below the full new State Pension rate

Crucially, this doesn't mean you "lost" that money — it means it was redirected into your workplace pension instead of the state system, which is why it's worth checking any old defined benefit or contracted-out pension schemes you were part of, since they should reflect that extra value.

Where did the money go instead?

For most people who were contracted out, the reduced NI contributions were redirected into a workplace defined benefit (final salary or career average) pension scheme, which typically promised to pay a benefit at least broadly equivalent to what the Additional State Pension would have provided — often more, depending on the scheme's terms. If you were contracted out through a defined contribution scheme instead, the rebate was invested and its eventual value depends on investment performance, rather than being a guaranteed replacement.

Say Neil worked for a large manufacturing firm from 1985 to 2010 and was contracted out throughout via the company's final salary pension scheme. His State Pension starting amount in 2016 reflected the lower NI he'd paid towards the Additional State Pension during those years — but his workplace pension, in turn, includes a "Guaranteed Minimum Pension" element reflecting that contracted-out period, which should be paid alongside his other workplace pension benefits.

Checking whether you were contracted out

Understanding your contracted-out history matters for your overall retirement income, not just your State Pension — see our guide on how much you need to save for retirement for how workplace and state pensions fit together.

What it means for you now

If contracting out has left your State Pension starting amount below the full rate, you can still increase it by building up further qualifying years after 2016, up to the full new State Pension rate — the reduction from contracting out only applies to your pre-2016 starting amount, not to years added afterwards. This is one of the reasons it's worth checking your NI record and considering voluntary contributions if you're short of the 35-year threshold; see our guide on whether voluntary NI contributions are worth it for the details.

This is general information rather than personalised advice — how contracting out has affected your own figures depends on your specific work and pension history, so if anything on your forecast is unclear, it's worth clarifying with the Pension Service directly or getting guidance from MoneyHelper (moneyhelper.org.uk).

Defined benefit vs defined contribution: why it matters

The type of workplace pension scheme you were contracted out through makes a real difference to how confident you can be that the "trade" was a good one. If you were contracted out through a defined benefit scheme — one that promises a specific pension based on your salary and years of service, rather than depending on investment performance — the scheme typically guaranteed a Guaranteed Minimum Pension at least broadly equivalent to what you'd have received from the Additional State Pension, often with valuable extras like inflation protection and a spouse's pension built in.

If you were instead contracted out through a defined contribution scheme, where your reduced NI was invested in a pension pot rather than backed by an employer's guarantee, the eventual value depends entirely on how those investments performed over the years. In some cases this has worked out well for members; in others, particularly during periods of poor investment returns, it may have left some people with less than they'd have received from staying in the Additional State Pension. This is worth checking directly with any old defined contribution scheme you were contracted out through, rather than assuming it automatically matched or beat the state alternative.

Tracking down old contracted-out pensions

Many people who were contracted out decades ago have since changed jobs multiple times, and tracking down old workplace pension schemes can be genuinely difficult if paperwork has been lost or a scheme has since merged with another provider. The government's Pension Tracing Service is a free tool that can help locate contact details for old workplace pension schemes using your former employer's name, even if you no longer have any paperwork relating to it.

If you know or suspect you were contracted out at some point in your career but can't immediately place which scheme it was through, working through your employment history year by year and cross-referencing it against your State Pension forecast (which shows the periods affected by contracting out) can help narrow down which employer or pension provider to start tracing first.

Why this matters more than many people realise

Contracting out affected a huge number of people over its nearly 40-year existence, and the combined value of Guaranteed Minimum Pensions and other contracted-out benefits sitting in old, sometimes forgotten workplace schemes can be substantial. Because these entitlements were built up specifically in place of Additional State Pension, failing to track them down means potentially missing out on a real and often meaningful part of your total retirement income, not just a technical footnote in your State Pension calculation.

Given how much complexity surrounds contracting out, and how much it can vary from one person's employment history to the next, this is an area where getting a clear, personalised picture — ideally cross-checking your State Pension forecast against your full pension history with the help of a regulated adviser — tends to be worth the effort, particularly if you had a long career with one or more employers offering defined benefit pensions before 2016.

How advisers approach reviewing a contracted-out history

A regulated adviser reviewing your retirement position will typically start by requesting your State Pension forecast alongside details of any workplace pensions you held during your contracted-out years, then work through each period to establish whether the combined value of your State Pension and workplace pension benefits looks broadly reasonable compared to what you'd have received had you never been contracted out. This kind of cross-check can be genuinely difficult to do accurately without professional support, particularly for long careers spanning multiple employers and pension schemes.

Even if you don't engage an adviser for ongoing management of your finances, a one-off review focused specifically on reconciling your contracted-out history can be a worthwhile, bounded piece of work, especially if your career included a lengthy period with a single employer's defined benefit scheme where the numbers involved may be substantial.

How contracting out affected different generations differently

Because contracting out was available for the full 38 years it existed, its impact varies considerably depending on when you worked and for how long. Someone who started their career in the early 1980s and worked continuously for a large employer with a defined benefit scheme may have been contracted out for their entire working life up to 2016, while someone who started their career in the early 2000s, closer to when contracting out via defined contribution schemes became less common and eventually ended, may have a much shorter contracted-out history, or none at all if they worked mainly for smaller employers or the public sector under different rules.

Understanding roughly where your own career sits within this history can help set expectations for how significant contracting out is likely to be for your own State Pension calculation — a long career with a large private-sector employer offering a defined benefit scheme is more likely to show a meaningful contracted-out effect than a career spent mainly in the public sector or with smaller employers who never offered contracted-out schemes.

Final thoughts on making peace with a lower starting amount

If your State Pension forecast shows a lower-than-expected starting amount due to contracting out, it's worth remembering this reflects a genuine trade — value redirected into a workplace pension rather than value lost entirely. The key task isn't to feel short-changed by the State Pension figure alone, but to make sure you've properly accounted for and understood the corresponding workplace pension value that was built up in its place.

Once you've traced and understood both halves of the equation — your State Pension starting amount and your contracted-out workplace pension benefits — you'll have a much more complete and accurate picture of your total retirement income than by looking at either figure in isolation, which is ultimately the goal of understanding how contracting out has shaped your own retirement position.

Putting it all together

Contracting out affected millions of people over its nearly four-decade existence, and understanding whether and how it applies to you is an important part of correctly interpreting your own State Pension forecast. A lower-than-expected starting amount isn't a sign of missing entitlement so much as a sign that part of your retirement provision was redirected into a workplace pension instead — value that's still yours, just held in a different place than you might have expected.

The practical takeaway is straightforward: check your State Pension forecast to see whether contracting out has affected your starting amount, trace any old workplace pensions from your contracted-out years to confirm their value, and make sure both pieces are properly accounted for in your overall retirement income picture. Doing this once, thoroughly, gives you a complete and accurate understanding of how your working life has translated into retirement provision, rather than a partial picture based on the State Pension figure alone.

Getting professional help untangling your history

If your contracting-out history spans several employers or decades, or if you're struggling to trace old workplace pension schemes, the Pension Tracing Service can help locate old scheme contacts, while a regulated financial adviser can help reconcile your State Pension forecast against your full pension history in a way that's genuinely difficult to do accurately alone. MoneyHelper also offers free, impartial guidance that can point you towards the right resources for your specific situation.

Given how much value can be tied up in old contracted-out pension schemes, particularly defined benefit ones from a long career with a single employer, taking the time to properly trace and understand this part of your retirement provision is a genuinely worthwhile investment of effort, ensuring you have a complete and accurate picture of your total retirement income rather than an incomplete one based on your State Pension figure alone.

A final summary

To recap: contracting out ran from 1978 to 2016, redirecting some of your National Insurance towards a workplace pension instead of the Additional State Pension, which can leave your State Pension starting amount lower than expected without meaning any value was actually lost. Tracing and understanding any old contracted-out workplace pensions is essential to seeing your complete retirement picture.

If your forecast shows a contracted-out reduction, don't treat it in isolation — pair it with a proper review of your workplace pension history, using the Pension Tracing Service or a regulated adviser if needed, to confirm the full value of what you're entitled to across both your State Pension and any workplace schemes.