Year-End Money Moves 2026: 9 Checks Before Dec 31

Why does the calendar come before the portfolio?

Most year-end money mistakes are not about picking the wrong fund. They are about missing a date. December 31 is a hard wall for a long list of moves: 401(k) contributions through payroll, required minimum distributions, charitable gifts you want to deduct this year, and FSA spending in most plans. Miss the wall and the move is gone. You cannot fix it in January with a clever form.

Two dates deserve a sticky note on your monitor right now. First, your last payroll date. If you want more money in your 401(k) this year, the change has to hit a paycheck that lands in 2026, and payroll teams often need a week or two of lead time. Second, December 31 itself, for distributions, gifts, and FSA claims. Put both dates in your calendar today, with a reminder a week earlier. I have watched founders lose a full year of retirement room because they sent the payroll form on December 29 and it processed in January. The form was right. The timing was not.

One deadline is kinder than the rest. IRA contributions for 2026 can wait until you file your 2026 return, usually April 15, 2027. That is useful if cash is tight in December, but do not let it become an excuse to delay everything else. Use the extra IRA time on purpose, for a contribution you plan in December and fund in February, not as a reason to drift.

Which retirement buckets should you fill first?

Start with the free money. If your employer matches 401(k) contributions, make sure you capture the full match before December 31. A typical match, say 50 cents on each dollar up to 6% of pay, is a 50% instant return on that slice of money. No investment beats it, and no market timing replaces it. Check your year-to-date contributions in your payroll portal this week. If you are short of the match, raise your rate for the remaining paychecks.

Next, look at the 2026 limits with fresh eyes. The IRS raised the employee 401(k) limit to $24,500 for 2026, up from $23,500 in 2025. If you are 50 or older, add an $8,000 catch-up, for $32,500 in total. If you turn 60, 61, 62, or 63 in 2026, the catch-up is $11,250 instead, for $35,750 in total. The IRA limit rose to $7,500, with a $1,100 catch-up at 50 and over. Those are ceilings, not targets. Hitting the ceiling is great if cash flow allows it. Getting the match and a steady rate you can hold all year is better than a heroic December scramble you cannot repeat.

For self-employed founders, the same logic runs through a solo 401(k) or SEP IRA, and the rules are worth a careful read before year-end. Our solo 401(k) vs SEP IRA guide walks through which plan fits which income pattern, including the December 31 setup deadline that catches solo owners out. If you have no workplace plan at all, an IRA is your main lever, and the April filing deadline gives you room to fund it after you see your final income.

How do RMDs and Roth conversions work?

A required minimum distribution (RMD) is the withdrawal you must take from a retirement account in 2026 if you are 73 or older, or you inherited a retirement account. If you are 73 or older, or you inherited a retirement account, check whether a required minimum distribution (RMD) is due for 2026. The penalty for missing one is steep, and the fix after the fact is messy. Take the distribution before December 31, confirm it landed, and keep the confirmation. If you give to charity, ask your plan about a qualified charitable distribution, which can satisfy an RMD without adding to taxable income, within its own rules and limits. Do this in November if you can. December phone queues at custodians are long, and a failed transfer on December 30 is a bad way to end the year.

A Roth conversion is the opposite kind of move: you choose to pay tax now, in a year when your income is lower than usual, so the money can grow and come out tax-free later. It can be smart in a low-income year, a gap year between jobs, or a year when a business loss pulls income down. It can also be a costly mistake if it pushes you into a higher bracket, raises Medicare premiums, or uses cash you need for the tax bill itself. Run the numbers with your actual 2026 income, not a guess, and convert a slice rather than the whole account if you are unsure. Our Roth IRA conversion ladder guide covers the multi-year version of this plan in detail, so treat this section as the year-end decision point, not a second copy of that guide.

How do you do tax-loss harvesting once, and right?

Year-end is also the season for tax-loss harvesting, but only if you follow the wash-sale rule. In plain terms: if you sell a fund or stock at a loss and buy the same or nearly identical security within 30 days before or after the sale, the IRS disallows the loss for now. The classic fix is to sell one broad index fund and buy a different one that tracks a different index, keeping your market exposure while booking the loss. It works, and it is also easy to mess up across accounts, including an IRA, where a repurchase can cause trouble that is harder to undo.

Keep this section short on purpose. Our tax-loss harvesting guide covers the worked examples, ETF swaps, and crypto rules in full, and it was built for exactly this week of the year. Read it before you place any December trades. The one point worth repeating here: harvest losses you actually have, in accounts you actually control, and write down what you sold, what you bought instead, and the dates. A December trade you cannot explain in April is a headache you bought for yourself.

What happens to FSA money if you do not spend it?

A flexible spending account (FSA) is the most forgettable money in most households. Many plans still run on use-it-or-lose-it rules, with only a small rollover or a short grace period, and the exact terms sit in a benefits PDF nobody opens until December 28. Open it now. Check your balance, check the rollover or grace-period rule, and check which expenses count. Glasses, contact lenses, dental work you have been putting off, and prescriptions you can fill early are the usual sensible spends. A rushed December shopping spree on things you do not need is not a win just because the money would otherwise lapse.

A health savings account (HSA) is a different animal, and founders with a qualifying high-deductible health plan should treat it with more respect than a normal savings account. HSA money goes in pre-tax, grows tax-free, and comes out tax-free for medical costs, which is why planners call it triple tax-free. If you can afford to pay small medical bills from cash and let the HSA grow, that is often the stronger long-term play. Just do not confuse the two accounts at year-end: FSA money usually expires, HSA money usually does not. Mixing them up is how people leave real money on the table.

When does bunching charitable gifts save tax?

Here is the math most donors miss. For 2026, the standard deduction is $16,100 for single filers and $32,200 for married couples filing jointly. If your itemized deductions, mortgage interest, state and local taxes, and gifts combined, fall below that line, extra gifts do not lower your tax bill at all. You still gave, and the charity still benefits, but the tax return does not notice.

Bunching is the plain fix. Instead of giving the same amount every year and never clearing the standard deduction, give two years of gifts in one year, itemize that year, and take the standard deduction the next. A donor-advised fund makes this easy in practice: you put a larger gift in during the bunching year, take the deduction then if you itemize, and the fund sends grants to your chosen charities on your normal schedule. Keep receipts for every gift, and for non-cash gifts, follow the IRS documentation rules for the value involved. December 31 is the cutoff for a gift to count this year, and a check mailed on December 31 but cashed in January still needs care, so give early enough for the charity to record it.

How should you reset cash and debt for January?

Before you chase one more tax move, look at the two numbers that decide whether January feels calm or tight: your emergency fund and your highest-interest debt. Our emergency fund guide argues for a fund sized to your real monthly costs, not a round number from a blog post, and December is a good time to top it up from a bonus or a strong quarter. Credit card debt at high rates is the reverse of an investment: every month it sits there, it charges you. Paying it down before year-end beats almost any market bet you could make with the same cash.

Two wider 2026 facts belong in your January plan. First, Social Security announced a 3.6% cost-of-living rise for 2027, lifting the average retirement benefit from about $2,095 to $2,170 a month, while the payroll tax cap rises from $184,500 to $192,300. If you are near retirement, or you employ people, both numbers change your 2027 cash flow. Second, mortgage rates are still high by recent standards: Freddie Mac put the average 30-year fixed rate at 7.40% on October 15, 2026. If you are house hunting, our mortgage rates guide works through the buy-now-or-wait math without pretending anyone can call the bottom. Do not let a year-end tax idea push you into a house payment you cannot hold.

Then set January up in one sitting. Confirm your 401(k) rate for the first January paycheck, set your HSA or FSA election during open enrollment if it is still open, and put a 30-minute money date on your calendar for the first week of January. You will review the December moves, file the confirmations in one folder, and write down the three money goals for 2027 while the year is still fresh. That single habit does more than any app I have tested.

Year-end number	Figure for 2026	Note
Employee 401(k) limit	$24,500, up from $23,500 in 2025	Per the IRS
IRA limit	$7,500, up from $7,000	$1,100 catch-up at age 50 and over
Standard deduction	$16,100 single, $32,200 married filing jointly	2026 figures
Social Security cost-of-living rise for 2027	3.6 percent	Average benefit about $2,095 to $2,170 a month
Average 30-year fixed mortgage rate, October 15, 2026	7.40 percent	Per Freddie Mac

What is your two-week plan, starting October 31?

Week one is paperwork. Check your 401(k) year-to-date total and your employer match. Check any RMD. Open the FSA benefits page and note the balance and deadline. Pull your giving receipts together. Week two is action. Place the trades, make the gifts, file the payroll change, and take the distribution, each with a confirmation saved. Do not leave all five for the last week of December. Custodian phone lines, payroll cutoffs, and charity offices all slow down in that week, and the cost of a missed deadline is a full year of waiting.

If you only have one free hour this weekend, spend it on the three moves with hard deadlines: the payroll change, the RMD check, and the FSA balance. Everything else in this guide can be planned in November. Those three cannot. And if a move in this guide does not fit your income, your plan, or your state rules, skip it and ask a tax professional about your case. A checklist is a starting point, not a substitute for advice on your own return. For the official numbers behind this guide, see the IRS, the Social Security Administration, and Freddie Mac.

The bottom line

Work the calendar before the portfolio. The 2026 limits are the deadlines in disguise: $24,500 into the 401(k) and $7,500 into the IRA, with a $1,100 catch-up at age 50 and over, and a standard deduction of $16,100 single or $32,200 married filing jointly that changes what bunching gifts or a Roth conversion is worth. Do the retirement buckets in order, handle RMDs and tax-loss harvesting before the year closes, and let the two week plan at the end of the guide turn a list of limits into moves that are actually done.

Frequently asked questions

What is the single most important year-end money move?

Capture your full employer 401(k) match, then check any required minimum distribution. The match is free money with a December 31 payroll deadline, and a missed RMD carries a steep penalty. Do those two first, then work through the rest of the checklist in order.

How much can I put in a 401(k) and IRA for 2026?

For 2026, the employee 401(k) limit is $24,500, or $32,500 at age 50 and over, or $35,750 if you turn 60 to 63 during the year. The IRA limit is $7,500, or $8,600 at age 50 and over. IRA contributions for 2026 can be made until you file your 2026 return, usually April 15, 2027.

Should I do a Roth conversion before December 31?

Only if the math works on your actual 2026 income. A conversion makes sense in a lower-income year, when you can pay the tax from cash outside the account and stay in the bracket you planned for. If it pushes you into a higher bracket or strains your cash, convert a smaller slice or wait for a better year.

What happens to unused FSA money at year-end?

It depends on your plan. Some plans allow a small rollover, some allow a short grace period into the next year, and some forfeit the balance. Check your plan document now, note the exact deadline, and spend the balance on qualifying care you actually need before that date.

Does bunching charitable gifts really save tax?

It can, if your yearly itemized total sits below the standard deduction. By giving two years of gifts in one year, you may clear the $16,100 single or $32,200 joint standard deduction for 2026 and itemize that year, then take the standard deduction the next. A donor-advised fund lets you keep your normal giving schedule to charities while bunching the tax year.