Best Tax Tips for Newlyweds (2026)

Everything below applies to tax year 2026, the return you file in spring 2027. Federal figures are from IRS Revenue Procedure 2025-32, which sets the 2026 inflation adjustments after the One Big Beautiful Bill Act. Oregon rules are from the Oregon Department of Revenue’s Publication OR-17. Every couple’s numbers are different, so treat this as a checklist of questions, not a set of answers.

1. Know that 31 December decides your filing status for the whole year

The IRS looks at your marital status on the last day of the year. If you are married on 31 December 2026, you are treated as married for all of 2026, even if the wedding was in late December. From then on you have two federal choices: married filing jointly or married filing separately. The IRS suggests working out the tax both ways before you choose.

• Joint filing puts both incomes and all deductions on one return, and IRS Publication 501 notes that both spouses can be held responsible, jointly and individually, for the tax, interest and penalties on it.
• Separate filing keeps the returns apart, but Publication 501 lists special rules that usually make it cost more: generally higher rates, and some credits, such as the earned income credit and in most cases the child and dependent care credit, are not available.
• Running both versions is routine for a preparer and is the only reliable way to compare them.

2. Report a name change to Social Security before you file

The name on your tax return has to match the name the Social Security Administration has on file for your Social Security number. If one of you changed your name, the IRS says to report it to the SSA before filing a return. A mismatch can delay a refund.

3. Update withholding: a new W-4 and a new Oregon OR-W-4

The IRS says newlyweds should give their employers a new Form W-4 within 10 days of the change, and points to its Tax Withholding Estimator for the numbers. Two incomes combined on one return often need more withholding than two single W-4s produce, especially when both of you earn similar amounts.

Oregon withholding is set on a separate form. The Oregon Department of Revenue’s 2026 Form OR-W-4 instructions say to complete a new one after a change in filing status, and also if the only form your employer has is a federal W-4 filed after 2017 that did not set Oregon allowances. The department recommends its online withholding calculator over the paper worksheets if you have more than one job, or if wages are over $100,000 ($200,000 for a married couple filing jointly).

4. Change your address everywhere the IRS will look

If either of you moved, tell the Postal Service, your employers and your bank. You can change your address with the IRS directly on Form 8822, Change of Address. IRS letters go to the address it has on file.

5. Check whether the brackets give you a marriage penalty or a bonus

For 2026, the joint standard deduction is $32,200, exactly twice the $16,100 for a single filer. The joint bracket thresholds are also exactly twice the single thresholds from the 10% bracket through the 35% bracket. The one place they are not is the top rate: 37% starts above $640,600 of taxable income for a single filer and above $768,700 for a married couple filing jointly.

• Couples with very different incomes often pay less together than apart, because the lower income fills the lower brackets. That is the so-called marriage bonus.
• Two high earners with similar incomes can pay more jointly once their combined income reaches the 37% bracket.
• Credits and deductions that phase out with income have their own thresholds, so bracket math is only part of the answer.

6. File the same way in Oregon as you do federally

Oregon’s general rule, set out in Publication OR-17, is that your Oregon filing status must be the same as your federal filing status. If you file jointly with the IRS and both of you are Oregon residents, you file jointly with Oregon. If you file separately federally, each of you files a separate Oregon return.

There is one exception worth knowing near the river: if you file a joint federal return but only one of you was an Oregon resident, Oregon lets you choose between one joint Oregon return and two separate Oregon returns. Head of household is not an option in that case. Which is better depends on where each of you earned income.

7. If your spouse lives in Washington, ask about community property

Oregon is not a community property state, but Washington is one of the nine that are. Publication OR-17 notes that an Oregon resident whose spouse lives in a community property state may be taxed on part of the spouse’s income, and that the community property rules of the state where the spouse lives decide how much. It comes up mainly when spouses live in different states and file separate returns, which is exactly the situation where it is easy to get wrong. See multi-state returns.

8. Rethink itemizing, together

A joint return has one set of deductions. Compare your combined itemized deductions with the 2026 joint standard deduction before deciding. If you file separately, the choices are linked: Oregon’s rule is that a spouse filing separately gets a standard deduction of $0 when the other spouse itemizes. Build your records for the first joint year with the tax document checklist.