Government-funded Childcare house

Previous post was rejected as too specific, will try to make this more general. What happens to the government-funded childcare hours if adjusted net income unexpectedly goes over 100k at end of tax year in March, but do not have cash to make the required contribution to pension due to high taxes? Eg a surprise 20k bonus would put earnings at 120k - would need to contribute 16k of it to pension to bring back down to 100k, but the tax paid on this (before reclaiming through self-assessment) would be very high and not leave the cash flow required to make the contribution. Assuming no additional funds are available so cannot make the required pension contribution, does this mean you'd have to repay the government funded hours? Or is there a solution, eg can the pension contribution be backdated (once tax refund is received after self-assessment)?

Hi,
Please contact the Childcare Service team for advice.
Childcare Service helpline
Thank you.