Guide
How Much Should I Contribute to My 401(k)?
Enough to get the entire employer match — that part isn't a judgment call, it's arithmetic. After that it becomes a real question with a real tradeoff, and the honest answer depends on your debts, your emergency fund, and what a percentage point actually costs your paycheck. Which is less than most people assume.
First, the whole match. Always.
If your employer matches 50% of the first 6% you contribute, then contributing 6% of an $80,000 salary means putting in $4,800 and receiving $2,400 you didn't have to earn. That's an instant 50% return, guaranteed, before the money is invested in anything.
Nothing else in personal finance offers that. Not paying off a credit card, not the stock market, not any investment anyone will ever pitch you. Contributing less than the full match is the only mistake in this entire article that has no defensible version — you are declining part of your compensation.
Find your plan's match formula before anything else. Common shapes are 50% of the first 6%, or 100% of the first 3-4%. Vanguard's 2026 How America Saves report put average employer contributions at a record 4.7% of pay, so if you don't know yours, it's likely worth something in that neighborhood.
While you're looking, check the vesting schedule — some employers require a few years of service before their contributions are fully yours. It doesn't change what you should contribute; it does change what you'd walk away from if you left.
What a contribution rate actually costs you
Here's the part that changes people's minds. Traditional 401(k) contributions come out before federal income tax, so a dollar contributed doesn't cost you a dollar of take-home pay.
Take that $80,000 single filer, whose top bracket is 22% under the 2026 brackets:
6% — $400/mo into the account, $312 out of your paycheck
10% — $667/mo into the account, $520 out of your paycheck
15% — $1,000/mo into the account, $780 out of your paycheck
At a 22% marginal rate, roughly 78 cents of every dollar you contribute comes out of your pocket. The other 22 cents is tax you would have paid anyway, redirected into your own account instead. You'll owe tax on it eventually, when you withdraw — but decades later, and on money that grew in the meantime.
The practical consequence: going from 6% to 10% sounds like a big jump. On this salary it costs about $208 a month in take-home. Over thirty years at a 7% return, that step is worth roughly $325,000.
So what number should you pick?
The common rule of thumb is 15% of gross pay including the employer match, and it's a reasonable target — but "target" is the operative word. Vanguard reports an average savings rate of 12.1% across nearly five million workers, so 15% is ambitious rather than typical, and most people arrive there gradually rather than choosing it on day one.
A more useful way to think about it, in order:
Floor: whatever earns the full match. Non-negotiable.
Target: 15% of gross including the match. If your employer contributes 4-5%, that means 10-11% from you.
Ceiling: the IRS limit, which for 2026 is $24,500 of your own salary. Employer contributions sit on top and don't count toward it. If you're 50 or older you can add $8,000, and there's a larger $11,250 catch-up available for ages 60 through 63.
If you're between the floor and the target, you're doing fine. The gap closes with raises.
The ladder that actually works
Almost nobody jumps from 3% to 15% voluntarily, because the paycheck difference is felt immediately and the benefit is thirty years away. What works is making the increase invisible.
Raise your contribution by one percentage point every time you get a raise. You never feel money you never took home, and on a typical raise schedule you'll reach a serious savings rate within a few years without a single month of pinch. Many plans offer automatic annual escalation that does this without you remembering — worth switching on today if yours has it.
The same logic applies to a bonus. If part of it is heading somewhere useful anyway, a bonus is the least painful money you'll ever redirect — you've already lived without it.
When you shouldn't be increasing it
Maxing out isn't the right move for everyone right now, and pretending otherwise would be dishonest. Three situations come first:
High-interest debt. Paying down a 22% credit card is a guaranteed 22% return. No investment reliably beats that. Get the match — that 50% still wins — then attack the card before adding anything more.
No emergency fund. Money in a 401(k) is difficult and expensive to reach before 59½. If a car repair would otherwise become credit card debt, three to six months of expenses in an accessible account is the higher priority.
A near-term goal you're actually saving for. A house down payment in two years doesn't belong in a retirement account.
Get the match regardless — it's free money in every one of these scenarios. Then handle these before pushing toward 15%.
Two things worth knowing
If your plan offers both traditional and Roth, the choice comes down to your tax rate now versus your tax rate in retirement. Traditional deducts today; Roth is taxed today and comes out tax-free later. Younger earners in lower brackets often favor Roth for exactly that reason — the deduction is worth less now than the tax-free growth will be worth later.
And if you're contributing a large percentage, check whether your plan has a "true-up" provision. Without one, front-loading contributions early in the year can mean hitting the annual limit before December and missing employer match on the remaining paychecks. Spreading contributions evenly avoids it.
None of this outranks the first rule, though. Get the full match. Then raise it a point at a time and let the years do the work — as we covered in why starting early matters more than starting big, time is the input you can't buy back.
A necessary note. This is general education, not financial, tax, or investment advice, and it isn't a recommendation to take any particular course of action. It doesn't account for your income, tax situation, debts, plan options, or time horizon. Investing involves risk, including possible loss of principal. Contribution limits and rules change; verify current figures with the IRS or your plan administrator, and talk to a qualified professional about your own circumstances.