Catch-Up Contributions: What Starting At 50 Recovers

My dad turned 51 and asked me over dinner whether it was too late. He had funded his 401k properly for about eight years and ignored it for the twelve before that, and he wanted to know whether the extra contributions people mention at 50 were a real fix or a consolation prize.

Both, it turns out.

A catch-up contribution is extra room in a retirement account, on top of the normal annual limit, that opens once you reach a certain age. The threshold has been 50 for a long stretch, recent law added a different and larger allowance for a narrow band of ages in the early sixties, and the dollar figures move most years. Look the current ones up on the IRS site before you touch your payroll election.

What fifteen years of extra room buys

Start with a balance of $200,000 at age 50. Put in $23,000 a year, assume the account returns 6% a year, and let it run to 65. That lands at roughly $1,014,700.

Now add $7,500 a year of catch-up room on top, so $30,500 a year going in, same 6%, same fifteen years. That lands at roughly $1,189,200.

$174,570.

You can check that figure without the chart, because the starting balance drops out of it entirely. $7,500 a year for fifteen years at 6% compounds to $7,500 multiplied by 23.28, which is $174,570. Whatever you had at 50 grows the same either way.

What it does not buy

Run the same $7,500 a year from 30 to 65 at the same 6% and it compounds to about $835,800. Identical contribution, identical return, twenty extra years on the front.

So catch-up room recovers a meaningful slice, somewhere around a fifth of what the same money would have done with a full career behind it. It is not a repair. It is a real $174,570 that otherwise does not exist, which is enough to change what the first few years of retirement look like and not enough to undo a decade of not paying attention.

The part that surprised my dad was that the extra room is worth the most in the years he was least inclined to use it. Money going in at 50 has fifteen years to compound. Money going in at 63 has two.

Raise it one point first

Before you go looking up catch-up limits, raise your contribution rate by one percentage point. On a $90,000 salary that is $900 a year, $75 a month, and over fifteen years at 6% it comes to $20,948.

One point is small enough that it disappears into a paycheck and large enough to be worth $20,000. Most payroll systems will also let you schedule an automatic one point increase every year on your work anniversary, which turns a decision you have to keep making into one you make once.

The IRA has its own version

A 401k is not the only account with extra room after 50. Traditional and Roth IRAs carry their own catch-up allowance, smaller in dollar terms, and it is separate from whatever your workplace plan allows.

So a household with two earners over 50 can have four separate buckets of catch-up room open at once, two workplace plans and two IRAs. That is worth ten minutes with a spreadsheet, because the usual assumption is that there is one limit and it covers everything.

Income limits apply to some of those options and the amounts move, so the IRS contribution limit page is the only source worth trusting. Recent law also changed how catch-up contributions are treated for higher earners in workplace plans, pushing some of them into Roth treatment, which changes your tax bill this year rather than your balance at 65.

Then go find out what the twelve ignored years are actually invested in. Mine were sitting in a fund charging 0.71% a year, which on a $200,000 balance is $1,420 annually, and that is a bigger number than it looks.