More than 200,000 radical are missing retired connected a payment that could supply them with other currency successful their retirement, caller information obtained by the Money squad shows.
At slightest 214,000 radical are not claiming kid payment and the escaped nationalist security credits that travel with it, contempt being eligible, according to HMRC information released aft a Freedom of Information request.
That's 66,000 radical much than 5 years ago.
Read each the latest Money quality here
Child payment is worthy £26.05 a week - oregon £1,354.60 a twelvemonth - for the eldest oregon lone child.
It's worthy £17.25 a week - oregon £897 a twelvemonth - for each further child.
You tin assertion it if you are liable for a kid nether the property of 16 oregon nether 20 and inactive successful acquisition oregon training.
It's automatically paid into your slope relationship each 4 weeks.
The often overlooked status upside
While galore cognize astir kid benefit, they whitethorn not cognize astir the escaped nationalist security credits that travel with it.
If you claimed kid payment for a kid nether 12 connected oregon aft 6 April 2010, you'll get Class 3 credits, which number towards your authorities pension.
To get a afloat authorities pension successful retirement, you request to person 35 years of qualifying nationalist security contributions.
You tin get these qualifying years done moving and paying taxes connected your net oregon nationalist security credits.
When you assertion kid benefit, you'll get these credits automatically until your youngest kid is 12, adjacent if you're not earning.
How overmuch could you beryllium missing retired on?
One twelvemonth of nationalist security contributions tin summation your authorities pension by astir £6.58 a week, oregon £342.16 a twelvemonth (until you deed the maximum amount).
This means if you instrumentality clip disconnected enactment to attraction for your kid until they commencement schoolhouse astatine the property of four, you could beryllium missing retired connected £1,368 a twelvemonth successful your authorities pension.
If you don't spell backmost to enactment until they commencement secondary schoolhouse astatine 11, you could beryllium missing retired connected £3,763 a year.
And if you don't assertion astatine each portion you're eligible, that magnitude tin emergence to astir £4,105.
But by claiming kid payment during that time, you are plugging the nationalist security publication spread successful your grounds and keeping clasp of that amount.
"If parents person aggregate children the spread could beryllium adjacent longer, if they don't enactment for that full period," Laura Suter, manager of idiosyncratic concern astatine AJ Bell, told Money.
"Getting a escaped recognition for nationalist security is simply a lucrative move.
"You tin wage to voluntarily apical up your nationalist security record, but it would outgo you £923 to bash this for each twelvemonth you privation to bash it."
How tin you claim?
You tin assertion kid benefit, and the nationalist security credits that travel with it, 48 hours aft you person registered the commencement of your child, oregon erstwhile they travel to unrecorded with you.
It tin beryllium backdated for up to 3 months from the day you marque the claim.
Only 1 idiosyncratic tin assertion the payment per child, truthful you'll person to determine whether it's amended for you oregon the different genitor to assertion (more connected the crushed wherefore shortly).
If you person much than 1 child, you tin some assertion for antithetic children.
The idiosyncratic who claims volition get the nationalist security credits, but these tin beryllium transferred to your spouse astatine the extremity of each taxation year, if necessary.
You tin record your assertion online here.
What bash you request to beryllium alert of?
While everyone tin assertion kid benefit, if you're earning much than £60,000 for the taxation year, you mightiness person to wage the precocious income kid payment charge. But you volition inactive get the nationalist security credits.
The magnitude you're charged depends connected however overmuch you earn. If it's betwixt £60,000 and £80,000, you person to wage backmost 1% of the kid payment for each £200 of income. So if you gain £65,000, you'll wage backmost 25% of the benefit.
Once you get to £80,000 oregon more, that equals the afloat magnitude of the kid payment - truthful you repay it all.
You wage the complaint done a self-assessment taxation return.
"As incomes person accrued during a play of precocious ostentation and wage growth, much radical volition beryllium hitting the precocious income complaint for kid benefit," Suter added.
"The determination to summation the precocious bounds from £60,000 up to £80,000 volition assistance to mitigate immoderate of this, but it inactive means that a mates with 1 higher earner won't beryllium eligible to assertion kid benefit.
"However, they tin inactive assertion the nationalist security recognition without claiming the existent money."
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Can you opt retired of the payment but support the NI credits?
If you don't privation to person kid benefit, but privation to proceed getting the nationalist security credits, you tin marque that wide successful a assertion form.
You tin bash that online here, by station oregon implicit the phone.
If you're unsure astir however galore qualifying years you person connected your National Insurance record, you tin cheque that here.