What to Do After Getting Married: Legal & Financial Checklist

Your First 90 Days: The Newlywed Checklist at a Glance

The core tasks boil down to five categories: order certified marriage certificates, update your name (if desired), adjust your W-4 withholding, review every beneficiary designation, and create a shared financial plan. Tackling them in roughly this order prevents bottlenecks, because each step often depends on the one before it.

This guide is for engaged couples and newlyweds handling the transition into marriage together. Some items are genuinely time-sensitive: the IRS says to submit a new W-4 within 10 days, and your filing status is locked in by your marital status on December 31. Others, like updating a will or choosing an account structure, can happen over the first few months.

Step 1: Order Certified Copies of Your Marriage Certificate

Certified copies of your marriage certificate are the master key to almost every other item on this list, so order them first. Government agencies, banks, and insurers will not accept a regular photocopy; they need a copy with a raised seal or registrar's stamp from the vital records office in the state where you were married.

Certified copies typically cost between $15 and $35 each depending on the state. Order at least two or three upfront. You'll often need to submit an original to multiple agencies at the same time, and ordering extras now saves repeat trips later. You can usually request copies online, by mail, or in person through your county clerk or state vital records department.

Keep one copy in a safe place at home (a fireproof safe or lockbox) and use the others for the steps that follow.

Step 2: How to Change Your Name After the Wedding

If you or your spouse decide to change your name, the process follows a specific order: Social Security Administration first, then DMV, then passport office, and finally banks, employers, and everyone else. Skipping ahead causes mismatches that delay other updates.

Changing your name is entirely optional, and either spouse can choose to do it. There's no legal deadline, though handling it promptly prevents confusion on tax returns and pay stubs.

Social Security Administration

Start by completing Form SS-5 (Application for a Social Security Card) and bringing it to a local SSA field office or mailing it in. You'll need your certified marriage certificate and an unexpired government-issued ID such as a driver's license, state ID, or U.S. passport. The SSA specifically will not accept a birth certificate as proof of identity. The name update itself is free, and your new card typically arrives within two to four weeks.

This step matters for taxes because the IRS matches every return against SSA data. A mismatch between the name on your return and the name in SSA's file can delay your refund.

DMV

After your Social Security record is updated, visit your state's motor vehicle agency in person. Nearly every state requires an in-person visit so they can verify documents and take a new photo. Bring your certified marriage certificate, current license, and your Social Security card or number. Fees for a corrected license generally range from $10 to $45. Most offices issue a temporary paper permit on the spot, valid for 30 to 60 days, while your permanent card is produced and mailed.

Everyone Else

Once SSA and DMV are done, work through the rest of the notification list:

• Employer and HR/payroll
• Banks and financial institutions
• Credit card companies and lenders
• Insurance providers (auto, home, health)
• Utilities and subscription services
• State tax authority
• Passport office (travel.state.gov)
• Schools or professional licensing boards

Check autopay subscriptions for name mismatches, since a name that doesn't match your bank card can cause declined transactions.

Step 3: Update Your Tax Withholding and Filing Status

The IRS instructs newlyweds to submit a new Form W-4 to each employer within 10 days of the wedding. This is one of the most time-sensitive items on the checklist, and skipping it is how many couples end up owing thousands of dollars at tax time.

Why Dual-Earner Couples Often Under-Withhold

If both spouses work and simply check the "Married Filing Jointly" box on their new W-4s without completing the multiple-jobs worksheet, each employer calculates withholding as though that paycheck is the household's only income. The result is under-withholding. Combined wages can push a couple into a higher bracket, and dual-earner Medicare wages above the $250,000 married-joint threshold trigger a 0.9% Additional Medicare Tax that employers don't automatically withhold across two paychecks.

Before submitting your new W-4, run the numbers through the IRS Tax Withholding Estimator. It's designed for exactly this situation and will tell you how much additional withholding, if any, to request.

Filing Status: Joint vs. Separate

Married couples can file jointly or separately each year. Filing jointly usually results in a lower combined tax bill, but it's worth calculating both ways to see which makes sense for your situation. Keep in mind that your marital status on December 31 determines your filing status for the entire year. Even a December 31 wedding means you're considered married for the whole tax year.

Address Change

If either spouse moved, file Form 8822 (Change of Address) with the IRS. Correspondence from the IRS, including CP notices, refund status letters, and identity-verification requests, goes to the address on file. Missing a piece of IRS mail can turn a routine question into a much bigger headache.

Step 4: Review Beneficiaries and Basic Estate Documents

Beneficiary designations on retirement accounts, life insurance policies, and payable-on-death bank accounts override your will. That makes updating them one of the single most consequential items on this checklist. If your spouse isn't listed as the primary beneficiary, those assets could pass to an ex-partner, a parent, or whoever you named years ago, regardless of what your will says.

What to Update

Log into every financial portal and review:

• 401(k) and employer retirement plans (your HR department can help)
• IRAs and brokerage accounts
• Life insurance policies (including employer-provided coverage)
• Annuities and payable-on-death bank accounts

For each account, list your spouse as the primary beneficiary and name a contingent beneficiary in case you both need one. If you don't already have life insurance, this is a good time to look into it and designate both a beneficiary and a contingent beneficiary.

Estate Documents

Beyond beneficiaries, the first 90 days are also a good time to create or update these documents:

• Will or trust reflecting your new marital status
• Financial power of attorney naming your spouse (or another trusted person) to make financial decisions if you're unable to
• Medical directives including a living will, medical power of attorney, and HIPAA authorization so your spouse can access medical information and make decisions in an emergency

Drafting or revising wills, trusts, and powers of attorney is where a qualified estate planning attorney adds real value. These documents have state-specific requirements, and getting them right now avoids expensive complications later.

Step 5: Merge Your Finances and Set a Household Plan

Decide together how you want to structure your accounts, calculate your combined net worth, and build a household budget that reflects your shared goals. There's no single correct approach, but having the conversation early prevents misunderstandings down the road.

Account Structure

Couples generally choose one of three models:

None of these is inherently better. What matters is that you both agree on how money flows in and out.

Combined Net Worth and Credit

List every asset you both own (checking, savings, retirement accounts, real estate) and every liability you owe (student loans, credit cards, auto loans). Your credit scores do not merge when you marry, but if you plan to buy a home or car together, lenders will look at both scores. The lower score often dictates the interest rate you're offered, so knowing where you each stand helps you plan.

Health Insurance and Benefits

Marriage is a qualifying life event, which means you typically have 30 to 60 days to add your spouse to your employer-sponsored health, dental, and vision coverage. Compare both employers' plans to see which offers better coverage or lower premiums. If one spouse doesn't have coverage, this window is especially important.

Also review employer-provided life insurance or disability coverage to see whether you can add a secondary contact or increase your coverage amount.

Ongoing Money Conversations

A budget created in month two will need adjustments by month six. Schedule a regular check-in, monthly or quarterly, to review spending, revisit savings goals, and talk through any financial decisions on the horizon. If you're considering a prenup or postnup, or want to revisit the terms of one, this planning stage is a natural time to bring it up.

When to Bring in a Professional

Most of the items on this checklist are administrative: filling out forms, logging into portals, and visiting government offices. They're free or low-cost, and you can handle them as a couple over a few weekends.

But some tasks benefit from professional guidance:

• Tax preparer or CPA: Helpful if your combined income puts you in a new bracket, you have complex deductions (mortgage interest, charitable contributions, self-employment income), or you're unsure whether to file jointly or separately.
• Estate planning attorney: Needed for drafting wills, trusts, powers of attorney, and medical directives that meet your state's legal requirements.
• Financial planner: Valuable if you're merging significant assets or debts, planning a home purchase, or want a long-term investment strategy that accounts for both partners' goals.

You don't need to hire all three at once. Start with the estate documents (especially if you have children, property, or complex assets), and layer in tax and financial planning as your first year unfolds.