Costing a career break before you take one

Everything below about career breaks comes from what actually happens rather than from what is supposed to.

Three costs, not one

Salary forgone is immediate and visible; lost pension contributions compound silently for decades. The third is the earnings trajectory: people frequently return at or below their previous level and take years to recover the gap.

Adding all three produces a very different figure from the first alone. There are offsets to put on the same page — childcare not paid for, commuting removed, and in some systems caring credits that protect a state pension record — and omitting them overstates the cost as badly as ignoring the pension understates it.

The pension gap is the largest over time

Contributions missed early have the longest time to compound, so a break in your thirties costs more than the same break later. Employer matching is also forgone for the period, doubling the effect.

Some systems allow later catch-up contributions, and using them requires knowing the gap exists. State and workplace provision behave differently here, since a workplace gap is missing contributions while a state entitlement often rests on qualifying years that caring credits can preserve if they are claimed at the time.

Re-entry is where the trajectory bends

Returning to a role at the previous level is common; returning to the previous rate of progression is less so. The gap compounds because subsequent rises are calculated from the lower base. This is well documented in research on parental leave and is the main mechanism behind long-run earnings gaps.

The direction of that research is consistent while the magnitude varies considerably by country, occupation and length of break, so it describes a pattern rather than a forecast for any particular return.

Part-time changes the arithmetic

A reduced-hours return preserves continuity, pension contributions and progression far better than a full break. It costs less in total than the difference in salary suggests once those are counted.

In practice, where it is available, it is usually the cheaper version of the same outcome. Reduced hours carry their own penalty in many labour markets, since fewer senior roles are offered part-time and the same workload is sometimes compressed into fewer paid days rather than genuinely reduced.

Some breaks are worth the cost

None of this is an argument against taking one; it is an argument for knowing the price before deciding. A decision made with the full figure in view is a decision; one made with only the salary in view is a guess.

Writing the number down also makes it easier to plan the years around it. Many breaks are not chosen at all — illness, redundancy, a parent needing care — and there the figure is useful for planning the return rather than for evaluating a decision nobody got to make.

Adjust the size of it until it is something you would actually do tired.

What to arrange before it starts

Anything attached to employment usually ends with the pay, including income protection, life cover through work, professional membership and training entitlements, and replacing them later can cost more or be declined on health grounds. Ask in writing what happens to service-related entitlements during the break, because whether continuity is preserved or reset decides notice, sick pay and redundancy terms on return.

Where it helps most, keeping a licence, registration or professional membership current through the break is generally far cheaper than restoring it afterwards. Where the household will run on one income, the protection question changes shape entirely, since the risk of that income stopping is now the whole risk rather than half of it.

The takeaway

Add the pension gap and the re-entry effect to the lost salary. Then decide.

The version you keep doing is the version that works.