Read your spouse's pay stub, then build one budget from both

Quick answer: Budget from take-home pay, never gross. Then spend twenty minutes with both stubs side by side and check four things: the match, the withholding, the benefit deductions, and the year-to-date column. This is general education, not personal financial or tax advice.

Start with the number that actually lands

Say one of you earns $67,600 a year, paid every other week. That's a $2,600 gross check. The deposit that hits the account is $1,868.37. The $731.63 gap isn't missing. It went somewhere, and the stub tells you where.

The example below is made up, but the layout will look familiar:

• Gross pay: $2,600.00
• 401(k), 5%: $130.00
• Health and dental premiums: $95.00
• Social Security (6.2%): $155.31
• Medicare (1.45%): $36.32
• Federal withholding: $230.00
• State withholding: $85.00
• Net pay: $1,868.37

Your household budget is built on that last line. Not on the salary you tell people at barbecues.

The four blocks on any stub

Earnings. Gross pay, hours if you're hourly, and any overtime or bonus lines. If a spouse's pay swings, this block tells you by how much. Budget off the low month.

Pre-tax deductions. Health premiums, retirement contributions, an HSA or flexible spending account. This is money you're keeping, just parked. A 401(k) dollar is still your dollar. Don't count it as spent, and don't count it as spendable either.

Taxes. Federal, state, Social Security and Medicare. The last two are flat percentages, so they're easy to check. Federal withholding is an estimate based on the W-4 your spouse filled out, and it's the one most worth a second look.

Net pay and year-to-date. The YTD column adds up every check since January. It's the most honest column on the page, and almost nobody reads it.

Five things worth checking at the table

1. The match. If the employer matches retirement contributions, find the rule. Dollar for dollar up to 3% of pay, in our example, is $78 a check. If the contribution line is under that, free money is walking out the door. If your spouse contributes more than the match, that's a choice. Make it on purpose.

1. Premium tier. Is the health deduction for employee-only, employee plus spouse, or family? If one of you has coverage through the other's job and also pays for your own, you may be paying twice. Compare both employers' plans in open enrollment. A pro at HR or an insurance broker can sort out what fits your situation.

1. Duplicate or forgotten deductions. Supplemental life, accident or disability policies you signed up for three years ago and never revisited. Some are worth keeping. Know which ones and why. Our piece on how much life insurance you need can help you decide whether the group coverage on the stub is enough.

1. Year-to-date taxes versus pay. Divide YTD federal withholding by YTD gross. That's your effective withholding rate. If it's far from what you expect to owe, you'll either get a surprise refund or a surprise bill.

1. Paycheck count. Paid every two weeks, you get 26 checks, not 24. Two months a year bring a third one.

The W-4 problem two-earner couples run into

Each employer withholds as if that job is the only income in the house. Two jobs can push you into a higher bracket than either employer assumes. The result is a smaller refund than you expected, or a bill in April.

The W-4 has a step for exactly this, and the IRS publishes a Tax Withholding Estimator on its website. Sit down with both stubs, last year's return, and run it together. It takes about fifteen minutes. If there's self-employment income, a side business or a big life change, ask a CPA or enrolled agent rather than guessing.

One caution. A big refund isn't a win. It's an interest-free loan to the government that you made by accident. Aim for close to even.

Build one budget from two stubs

Take both net pay figures and convert each to a monthly number. Don't just double a biweekly check. Multiply by 26 and divide by 12. In our example, $1,868.37 × 26 ÷ 12 comes to about $4,048 a month.

Add the second paycheck to that. Now you have household take-home. Build the budget in this order:

• Fixed essentials first: housing, utilities, insurance, groceries, transportation, minimum debt payments.
• Cushion next. If your emergency fund isn't built, read why it's insurance, not savings and fund it before you get fancy.
• Debt after that, in the order the math says. This piece lays it out.
• What's left is spending money. Give each of you a set amount with no questions asked. It prevents more arguments than any spreadsheet.

Then use the three-paycheck months. Don't let the extra check dissolve into dinners out. Pre-assign it: the annual insurance premium, the holiday fund, a debt chunk. That's two extra paychecks a year, and a household that plans for them gets ahead without noticing.

How to ask without it sounding like an audit

This is where plenty of couples get stuck. One spouse handles the money, the other hasn't looked at a stub in years, and now somebody has to say "can I see yours?"

Say it plainly. "I'd like us to look at both stubs together. I'm not checking up on you. I want us running one set of books." Offer to start with yours. If you've been the one who didn't know, own it, then show up with a coffee and a pen. That's the whole job.

Marriage works better when both people can see the whole picture. Nobody gets to run the household finances from behind a curtain, however good their intentions. And the person who has handled the money so far deserves a partner who finally pitches in, not one who walks in and rearranges everything.

You'll probably find something. A deduction nobody remembers, a match going uncollected, a withholding setting that's two jobs old. None of it is a scandal. It's a Saturday morning's work, and it pays every paycheck after.

Keep the stubs for the year. At January, compare the last one against the W-2. They should agree. If they don't, call payroll before you file.