Maternity and Paternity Leave: What It Really Does to Your Finances

This article represents a personal view and is not financial advice. Statutory pay rates and eligibility rules change and vary by employer, so always check your own contract and current government guidance before relying on any figure here.

Most expectant parents know, roughly, that maternity or paternity leave means a pay cut. Far fewer have actually modelled what that cut looks like month by month, and the shape of it catches a lot of families off guard, because it isn't a steady reduction. The drop arrives all at once.

How Statutory Pay Actually Works

Statutory Maternity Pay is typically paid at 90% of average weekly earnings for the first six weeks, then drops to a much lower flat weekly rate (or 90% of earnings if that's lower) for up to 33 further weeks, with the remaining leave unpaid. That first six weeks can feel deceptively manageable. The following months, at a flat rate that hasn't kept pace with the cost of living, are where household budgets come under real pressure. Not everyone qualifies for SMP, either: parents who don't meet the continuous-employment or earnings tests (for example after recently changing jobs or becoming self-employed) may instead be able to claim Maternity Allowance, which pays a similar flat rate through a different route.

Statutory Paternity Pay is shorter, up to two weeks, at the same flat statutory rate. It's a smaller reduction in absolute terms, but for the partner who was previously the second income, it still matters, particularly if it lands in the same weeks as other new costs.

Employer Enhancements Change the Picture Completely

Many employers offer enhanced maternity or paternity pay well above the statutory minimum, sometimes full pay for a number of weeks or months. This is the single biggest variable in the whole calculation, and it's worth checking your contract or staff handbook precisely rather than assuming either the best or the worst case. Two households with identical salaries can have completely different affordability pictures purely because of what their respective employers offer.

Shared Parental Leave

Shared Parental Leave allows eligible parents to split the remaining leave and pay after the first two weeks, rather than it defaulting entirely to one parent. Used well, it can smooth the income hit across both incomes rather than concentrating it entirely on one. That's useful if one partner's employer offers a stronger enhanced pay package than the other's.

Don't Forget Pension Contributions

During paid statutory leave, employers are generally still required to continue employer pension contributions based on your normal (pre-leave) salary, even though your own pay has dropped. This depends on your contribution structure, though, and can lapse once pay becomes unpaid. It's an easy detail to miss and worth confirming directly with HR, since it affects your long-term numbers as well as your monthly cashflow.

Modelling the Dip Before It Arrives

The households that feel parental leave least painfully are usually the ones who modelled the actual month-by-month income curve in advance, rather than discovering the drop after the first reduced payslip. In CrestCast you can build the leave period as a temporary income change against your normal salary, layer in your specific employer's enhanced pay structure, and see exactly which months are tightest, so you know in advance whether you need a buffer built up beforehand, and how large it needs to be.

If that buffer needs building from a standing start, the months you have left to do it in matter as much as the target. The savings goal calculator works out what you would need to set aside each month between now and the due date to have it ready in time.

And the leave months are only the opening chapter: the childcare years that follow are usually the bigger number, and worth modelling in the same CrestCast forecast, so the leave dip and the childcare years show up as one continuous projection rather than two separate shocks.