If you have any gaps in your National Insurance record, now might just be a very good time to plug them.

The generous Government scheme which allows people to fill historic gaps in their NI record will come to an end in less than six months – and financial services company LCP is urging those who could benefit to apply before the deadline.

How generous? Someone who was retired for twenty years would get back around £55,000 in total (before tax) for a one-off payment of a little over £8,000.

The opportunity is very much a one-off, as LCP explains: “Under normal rules, it is only possible to fill gaps in your NI record up to six years after the year in question.  After that point, the year becomes a permanent gap in your NI record and could affect your ability to build up a full state pension.  This means that 2016/17 would normally be the oldest year which could be filled in 2022/23.

“However, for a limited period – until 5th April 2023 – people are able to go much further back and fill gaps for any year from 2006/07 onwards – an extra ten years.  This concession applies only to those who come under the new state pension system, namely those who reached (or will reach) state pension age after 5th April 2016.”

In some cases, buying back missing years can be extremely valuable.  The current cost of voluntary Class 3 NI contributions is £15.85 per week or £824.20 per year.  This one-off lump sum payment can add up to 1/35 of the full rate to your eventual state pension.  As the state pension is currently £185.15 per week, this boost is worth £5.29 per week or around £275 per year.  Someone who gets this boost for at least four years will recover their initial outlay (net of basic rate tax) and everything beyond that would be profit.

In an extreme case, someone who missed the deadline would lose the chance to top up a further ten missing years of NI contributions (from 2006/07 to 2015/16 inclusive).  Although the outlay would be £8,242 (ten lots of £824.20), the annual state pension boost would be around £2,750.  Someone who was retired for twenty years would get back around £55,000 in total (before tax) for a one-off payment of a little over £8,000.

“However,” adds LCP, “anyone thinking of topping up their state pension for these earlier years must check with the Future Pension Centre at DWP before making such contributions.  This is because there are some situations in which paying historic contributions would not boost your state pension.  This could be particularly true for those who are short of a full state pension because of extensive periods of ‘contracting out”.

According to LCP partner and former pensions minister Steve Webb: “For many people, paying voluntary NI contributions can be great value for money and can help them boost their state pension in a cost-effective way.  For people with gaps in their NI record going back more than six years, the window to fill those gaps will soon close.   Some people have gaping holes in their NI record and this will be the last chance to fill them.  Although topping up is not the right answer for everyone, and people should always check with DWP before handing over any money, for some people this could be by far the best rate of return they could get on any spare capital.  Missing out could cost some workers thousands of pounds”.

If you think your retirement income might be affected by these changes, it’s easy to adjust your calculations by changing the inflation figure in your RetireEasy LifePlan that you think your pensions will increase by each year.

That way you can be sure to have a much more accurate picture of the income you can expect to enjoy… and make any necessary changes to your plans in good time.