Child benefit withdrawal will make it better to work less for families with over seven children

And come 2076, that will be the case for every family in the nation.

The child tax credit withdrawal, taking effect on Monday, will lead to marginal tax rates of over 100 per cent on families with more than eight children earning between £50,000 and £60,000.

The IFS explains how the marginal rates are calculated:

Affected taxpayers will pay back one per cent of their family’s Child Benefit for every £100 by which taxable income exceeds £50,000. One per cent of Child Benefit is £10.56 per year for a 1-child family, and an additional £6.97 per child for larger families. Hence the marginal tax rate between £50,000 and £60,000 is increased by about 11 percentage points for the first child and by an additional 7 percentage points for each subsequent one. So, for example, while about 320,000 people will find that their marginal income tax rate increases to more than 50%, about 40,000 of them - those with three or more children - will find that it jumps to at least 65%.

They offer a chart with the rate calculated up to four children:

By seven children, the marginal rate rises to 99.35 per cent, and by eight, it breaks 100 per cent (106.32 per cent, to be exact). This means that any individual with a family of eight kids earning between £50,000 and £60,000 would be better off if they reduced their salary back down to £50,000. In fact, for that individual, they would have to earn £61,105 before their post-tax income was the same as it was at £50,000.

It's unclear whether any families actually exist matching that criterion - rather wonderfully, my back-of-the-envelope maths (which assumes that the exponential decrease in the number of families of each size continues: e.g., there are 1/8th the number of families with three or more kids as there are with two or more, so I'm assuming that there are correspondingly 1/8th the number of families with four or more as there are with three or more, and so on) suggests that there may be exactly one – but even if there are none at the moment, there's no reason why there won't be one in the future. Families with eight children do, after all, exist.

In fact, as time goes on, this problem will get worse. The IFS points out that child benefit is uprated with inflation, while tax bands aren't. Currently, each extra child after the first increases your "marginal tax rate" by around seven per cent, but suppose child benefit is uprated by two per cent a year. In that case, the marginal tax would exceed one hundred per cent for families with seven children next year; for six children in the year 2020; for five children in the year 2028; and, eventually, for families with just one child – i.e., every family – in the year 2076.

Hopefully the law will be changed before then, of course. But as a rule of thumb, laws which become ridiculously damaging unless you actively intervene ought not be signed in the first place. Oops.

Children. Photograph: Getty Images

Alex Hern is a technology reporter for the Guardian. He was formerly staff writer at the New Statesman. You should follow Alex on Twitter.

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Stability is essential to solve the pension problem

The new chancellor must ensure we have a period of stability for pension policymaking in order for everyone to acclimatise to a new era of personal responsibility in retirement, says 

There was a time when retirement seemed to take care of itself. It was normal to work, retire and then receive the state pension plus a company final salary pension, often a fairly generous figure, which also paid out to a spouse or partner on death.

That normality simply doesn’t exist for most people in 2016. There is much less certainty on what retirement looks like. The genesis of these experiences also starts much earlier. As final salary schemes fall out of favour, the UK is reaching a tipping point where savings in ‘defined contribution’ pension schemes become the most prevalent form of traditional retirement saving.

Saving for a ‘pension’ can mean a multitude of different things and the way your savings are organised can make a big difference to whether or not you are able to do what you planned in your later life – and also how your money is treated once you die.

George Osborne established a place for himself in the canon of personal savings policy through the introduction of ‘freedom and choice’ in pensions in 2015. This changed the rules dramatically, and gave pension income a level of public interest it had never seen before. Effectively the policymakers changed the rules, left the ring and took the ropes with them as we entered a new era of personal responsibility in retirement.

But what difference has that made? Have people changed their plans as a result, and what does 'normal' for retirement income look like now?

Old Mutual Wealth has just released. with YouGov, its third detailed survey of how people in the UK are planning their income needs in retirement. What is becoming clear is that 'normal' looks nothing like it did before. People have adjusted and are operating according to a new normal.

In the new normal, people are reliant on multiple sources of income in retirement, including actively using their home, as more people anticipate downsizing to provide some income. 24 per cent of future retirees have said they would consider releasing value from their home in one way or another.

In the new normal, working beyond your state pension age is no longer seen as drudgery. With increasing longevity, the appeal of keeping busy with work has grown. Almost one-third of future retirees are expecting work to provide some of their income in retirement, with just under half suggesting one of the reasons for doing so would be to maintain social interaction.

The new normal means less binary decision-making. Each choice an individual makes along the way becomes critical, and the answers themselves are less obvious. How do you best invest your savings? Where is the best place for a rainy day fund? How do you want to take income in the future and what happens to your assets when you die?

 An abundance of choices to provide answers to the above questions is good, but too much choice can paralyse decision-making. The new normal requires a plan earlier in life.

All the while, policymakers have continued to give people plenty of things to think about. In the past 12 months alone, the previous chancellor deliberated over whether – and how – to cut pension tax relief for higher earners. The ‘pensions-ISA’ system was mooted as the culmination of a project to hand savers complete control over their retirement savings, while also providing a welcome boost to Treasury coffers in the short term.

During her time as pensions minister, Baroness Altmann voiced her support for the current system of taxing pension income, rather than contributions, indicating a split between the DWP and HM Treasury on the matter. Baroness Altmann’s replacement at the DWP is Richard Harrington. It remains to be seen how much influence he will have and on what side of the camp he sits regarding taxing pensions.

Meanwhile, Philip Hammond has entered the Treasury while our new Prime Minister calls for greater unity. Following a tumultuous time for pensions, a change in tone towards greater unity and cross-department collaboration would be very welcome.

In order for everyone to acclimatise properly to the new normal, the new chancellor should commit to a return to a longer-term, strategic approach to pensions policymaking, enabling all parties, from regulators and providers to customers, to make decisions with confidence that the landscape will not continue to shift as fundamentally as it has in recent times.

Steven Levin is CEO of investment platforms at Old Mutual Wealth.

To view all of Old Mutual Wealth’s retirement reports, visit: products-and-investments/ pensions/pensions2015/