Can I Add My Girlfriend or Boyfriend to My Health Insurance?

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Updated: August 21, 2026

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Key Takeaways
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11 states plus D.C. recognize civil unions or domestic partnerships for health insurance, with Hawaii offering reciprocal beneficiaries as an alternative option.

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You'll need documentation proving shared finances and cohabitation, like joint bank accounts, utility bills or co-signed leases.

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Employer-paid health insurance premiums for domestic partners count as taxable income, unlike coverage for spouses.

Adding Your Girlfriend or Boyfriend to a Health Insurance Policy

State domestic partnership laws and your employer's plan document together determine whether you can add a girlfriend or boyfriend to your health insurance. Eleven states and Washington, D.C. recognize civil unions or domestic partnerships. Several national carriers extend coverage to unmarried partners regardless of state law. Coverage requires documentation of the relationship, usually proof of shared finances or cohabitation. If your state isn't on the recognition list below, check your Summary of Benefits and Coverage document or contact HR before assuming you're ineligible.

Domestic partner health insurance plans cover a partner as a dependent, the same way spousal coverage works. You can also add children living in your home.   

National carriers and employer-sponsored plans sometimes cover unmarried partners even in states with no domestic partnership statute, if you meet the plan's documentation requirements. If your state isn't on the recognition list below, check your Summary of Benefits and Coverage document or contact your HR department before assuming you're ineligible.

With employer-sponsored plans, your own premium and your spouse's are pre-tax. A domestic partner's premium is post-tax. The IRS treats the employer's share of that cost as taxable income to you, which is known as imputed income, per IRS Publication 15-B.

WHAT DOES DOMESTIC PARTNER MEAN IN HEALTH INSURANCE?

A domestic partner for health insurance is someone you're in a long-term, marriage-like relationship with but aren't married to. This applies to both same-sex and opposite-sex couples.

Most insurers require that domestic partners meet all of the following:

Share a home and:

  • Split financial responsibilities like rent, utilities or other bills
  • Are 18 or older and can sign contracts
  • Have no other spouse
  • Aren't related in a way that would bar legal marriage

Adding Your Girlfriend or Boyfriend's Kids to Your Health Insurance

Your partner's children qualify as dependents on your health plan if your insurer recognizes the domestic partnership. You'll need paperwork proving both the partnership and that the children depend on you financially. Financial support records or legal guardianship papers are the most common accepted forms. Most states follow the ACA standard, which covers dependent young adults up to age 26, per HealthCare.gov.

States That Recognize Domestic Partnerships

Recognition of domestic partnerships and civil unions varies by jurisdiction, and each one sets its own eligibility rules. Legal status currently extends to these relationships in 11 states, and each one sets its own rules.

Washington limits eligibility to same-sex couples or opposite-sex couples where one partner is over 62. Oregon requires both partners to be at least 18 and one to live in the state. It expanded eligibility to opposite-sex couples in 2024. California opened its program to opposite-sex couples as well.

The National Conference of State Legislatures tracks the complete, current list of states with domestic partnership recognition.

Five states recognize civil unions:

  1. Colorado
  2. Hawaii
  3. Illinois
  4. Vermont
  5. New Jersey

Five states plus Washington, D.C., recognize domestic partnerships:

  1. California
  2. Maine
  3. Nevada
  4. Oregon
  5. Wisconsin

Hawaii uses its own category, "reciprocal beneficiaries," instead of a standard domestic partnership. The eligibility requirements differ from the domestic partnership rules other states use.

How to Add a Partner, Girlfriend or Boyfriend to My Health Insurance Plan?

Call your insurer first to confirm whether your plan covers domestic partners, then gather your documentation before the enrollment window opens.

  1. 1
    Check Your Policy's Eligibility Criteria

    Confirm with your insurance provider whether your plan allows you to add a partner.

  2. 2
    Gather Required Documentation

    You'll need proof of domestic partnership or civil union, evidence of shared financial responsibilities (like joint bank accounts or lease agreements) and sometimes an affidavit of domestic partnership.

  3. 3
    Enrollment Periods

    You can add a partner during your plan's annual open enrollment period or within 30 days of a qualifying life event, a status change that opens a special enrollment window. Qualifying events include domestic partnership registration, loss of other coverage or a move. Miss both windows and you'll wait until the next open enrollment period.

  4. 4
    Understand the Financial Implications

    Your premium will increase to cover your partner. Domestic partner coverage adds $200 to $500 per month on employer plans. With employer-sponsored plans, that added cost is post-tax. You pay it from after-tax income. The pre-tax payroll deduction your employer gives for spousal coverage doesn't apply to a domestic partner. 

    The IRS also counts your employer's share of your partner's premium as taxable income. Before you enroll, compare your added premium against your partner's premium on their own plan or through the Marketplace.

  5. 5
    Complete the Enrollment Process

    Complete your insurer's domestic partner enrollment form and submit it with your documentation packet. Most employers route this through HR, individual plan enrollees submit directly to the insurer or through HealthCare.gov.

  6. 6
    Review Plan Details

    Review coverage details, including network restrictions. Health maintenance organizations (HMOs) limit you to in-network providers. Preferred provider organizations (PPOs) and exclusive provider organizations (EPOs) offer more flexibility at higher cost.

Should You Add Your Girlfriend or Boyfriend to Your Plan?

Add your partner to your plan when the post-tax premium increase is lower than what they'd pay on a separate plan or Marketplace policy. Also check whether your plan's network covers their current doctors before enrolling.

Answer these four questions before deciding:

  • Financial impact: Calculate how much your premium will rise, and check the tax implications if you have employer-sponsored insurance.
  • Health care needs: Confirm your plan covers what your partner actually needs.
  • Relationship stability: Weigh whether you expect to share a plan together for the full plan year.
  • Better alternatives: Check whether your partner could find better coverage or lower costs through their own employer plan or an individual policy. You may both qualify for subsidies through Marketplace plans if neither of you has employer coverage.

Bottom Line

Eleven states and Washington, D.C. recognize domestic partnerships or civil unions. Your insurer's rules matter as much as state law. Insurer and employer plan rules vary independently, and some plans cover unmarried partners in non-recognition states if you meet their documentation requirements. Check your plan documents first before assuming state law is the deciding factor.

IRS Publication 15-B treats employer-paid premiums for a domestic partner as taxable income. Compare what your partner pays on a separate plan against your post-tax premium increase. When their employer covers part of their premium, that imputed income cost often makes two separate plans the cheaper option.

Adding Your Girlfriend or Boyfriend to Your Health Insurance Plans: FAQ

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About Mark Fitzpatrick

Mark Fitzpatrick, Licensed P&C Insurance Expert, MoneyGeek

Mark Fitzpatrick, a licensed Property and Casualty (P&C) Insurance Producer in Connecticut, is MoneyGeek's resident expert in insurance and economics. He has spent nearly a decade covering the insurance market at LendingTree and MoneyGeek. There, he has analyzed hundreds of carriers and millions of rates across auto, home, renters, health and life insurance.

His work has appeared in The Washington Post, The New York Times and NPR. He draws on independent cost and consumer experience data, and no insurance company partnerships affect his recommendations.

Mark studied at Boston College and later earned a master's in economics and international relations from Johns Hopkins University. He worked in financial risk management at State Street before joining MoneyGeek. He's also a five-time “Jeopardy!” champion.

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