How to Legally Adopt a Child in Missouri: Consent, Home Study, Costs

To adopt a child in Missouri, you must meet the state’s basic eligibility rules, pass a home study and background checks, obtain the consents Missouri law requires, live with the child for at least six months of supervised post-placement custody, and then ask a juvenile court judge to enter a final adoption decree. The rules governing every step sit in Chapter 453 of the Revised Statutes, and most families work with a licensed agency, an experienced attorney, or both.

Who Qualifies to Adopt

You generally need to be at least 21 years old.¹ There is one meaningful exception: a foster parent who is at least 18 and has cared for the same child continuously for nine months or more can apply to adopt that child, and both the agency and the court give preference to the current foster parent in that situation.²

Marital status is not a barrier. Single people, married couples, and unmarried partners can all adopt if housing and income are stable enough to meet licensure standards.¹ A disability or disease cannot be used to find someone unfit to adopt unless there is specific evidence that it creates a substantial risk of harm to the child.²

Choose Your Path

Missouri recognizes several adoption routes, and which one you take shapes your timeline, your costs, and who does most of the coordination.

Agency adoption, through the state Children’s Division or a licensed private agency. The agency handles matching, placement, and much of the paperwork.
Foster care adoption, for children already in state custody whose birth parents’ rights have been terminated. This is usually the least expensive route and often comes with ongoing financial assistance after finalization.
Independent adoption, where you connect directly with a birth parent, typically through an attorney. The legal steps are the same; coordination falls on you and your lawyer instead of an agency.
Stepparent adoption, where a stepparent adopts their spouse’s biological child. Missouri simplifies this route significantly.

Getting Consent from Birth Parents

Consent is where most adoptions succeed or fall apart. For a child under 18, Missouri requires written consent from the mother, from any man legally presumed to be the father, and from any existing legal parents.³ If the child is 14 or older, the child must also consent in writing.

Once a birth parent signs a properly executed written consent in Missouri, that consent is considered irrevocable.³ Before the final decree, a birth parent can try to withdraw consent, but only by proving through clear and convincing evidence that it was not freely and voluntarily given. Fraud or duress can also provide grounds, but the window is narrow and the birth parent carries the entire burden of proof.

The Putative Father Registry Deadline

An unmarried biological father who wants to preserve his right to object to an adoption must file a notice of intent to claim paternity with the Missouri Putative Father Registry before the child’s birth or within 15 days after birth.⁴ He must also file a paternity action in court within that same 15-day window.³

Missing the deadline waives the right to withhold consent. Not knowing about the pregnancy is not an excuse under the statute; the only recognized exceptions involve situations where the mother actively misled the father about the pregnancy or the child’s survival.⁴ Filing does not by itself establish legal paternity, but it does entitle the father to notice of any adoption proceeding.⁵

The Home Study and Background Checks

No adoption of a child under 18 can be finalized in Missouri without a written investigation that includes an assessment of the prospective adoptive parents.² The assessment looks at your home, your education, employment, finances, marital status, medical and psychological health, and criminal history. Plan to produce financial statements, medical records, personal references, and an autobiographical statement covering your background and your reasons for wanting to adopt. The evaluator also looks at whether your home has adequate space and whether your daily routines fit a child.

Background checks reach every adult in the household. Missouri requires fingerprinting for all household members over 18, with prints sent to the Missouri State Highway Patrol and forwarded to the FBI for a federal criminal records search.⁶ The state also checks the Child Abuse and Neglect Registry and searches for active orders of protection. None of this is negotiable.

Placement and the Six-Month Wait

Once the home study is approved and a match is made, the child is placed in your home. Missouri requires a minimum of six months of actual custody before the court will enter an adoption decree.⁷ During that period, a post-placement assessment continues. The Children’s Division or your child-placing agency must tell you about available post-placement services, which can include family counseling, periodic home visits, and connections to adoptive family support groups.⁸

The waiting period is not something you can shorten. It gives the court time to see that the placement is stable and the child is settling in.

Finalizing in Court

After the six-month post-placement period, you file a petition for adoption with the juvenile division of the circuit court.⁹ Anyone whose consent is required and who has not already filed consent with the court is served with a summons and a copy of the petition.¹⁰ At the hearing, the judge reviews the investigation report, confirms that the legal requirements have been met, and decides whether to finalize.

If the court approves, it enters a decree making the child, for all legal purposes, your child. The decree can also change the child’s name if you asked for that in the petition.¹¹ After the decree, the state issues a new birth certificate reflecting the adoptive parents and any name change, and the original birth certificate is sealed.

Stepparent Adoption

Stepparent adoptions follow a lighter version of the process. When the child is the biological child of one of the petitioners and every parent whose consent is required has given it, the court can waive the full investigation and report. The one thing the court cannot waive is the criminal background check.²

The harder piece is usually consent. The non-custodial biological parent must either agree to the adoption or have their parental rights terminated by the court. If that parent has been absent, has not supported the child financially, and has not maintained contact, there may be statutory grounds to proceed without consent. An attorney can tell you whether the facts of your case support that argument.

What It Costs and What Help Is Available

Costs vary widely by path. Foster care adoptions through the Children’s Division are typically free or very low cost. Private agency adoptions for domestic infants commonly run between $35,000 and $70,000 once you total agency fees, legal fees, and birth parent expenses. Independent adoptions fall in between and depend heavily on attorney fees and the birth mother’s medical costs. As a standalone item, home studies generally range from $1,000 to $5,000.

Foster Care Adoption Subsidies

Missouri offers adoption subsidies to families who adopt from foster care. Every child in the care and custody of the Children’s Division is treated as having special needs for subsidy purposes.¹² Children not in DSS custody may still qualify if they have factors that create barriers to placement, such as age, membership in a sibling group, ethnic background, or a medical or emotional condition. Subsidies can include monthly maintenance payments, medical coverage, and reimbursement for nonrecurring adoption expenses. The investigation report must address whether the child has been considered as a potential subsidy recipient.²

Federal Adoption Tax Credit

The federal government offers a tax credit for qualified adoption expenses, including agency fees, attorney fees, court costs, and travel. For adoptions finalized in 2026, the maximum credit is $17,670 per eligible child. Families with modified adjusted gross income below $265,080 can claim the full credit; the credit phases out completely above $305,080.¹³ A refundable portion of up to $5,120 is available for families whose tax liability is less than the full credit. Special needs adoptions qualify for the maximum credit even if actual expenses were lower.

Adopting Across State Lines

If you are adopting a child from another state or placing a Missouri child in another state, the Interstate Compact on the Placement of Children applies. Missouri requires ICPC compliance for all interstate adoptive placements, and skipping the process can delay or jeopardize the adoption.¹⁴ Both states must approve the placement before the child crosses state lines, and moving the child before approval is a violation of the compact. Your agency or attorney files the ICPC paperwork, but the interstate layer typically adds several weeks to the timeline.

1
Missouri Department of Social Services. Interested in Adoption
2
Missouri Revisor of Statutes. Missouri Code 453.070 – Investigation of Petition for Adoption
3
Missouri Revisor of Statutes. Missouri Code 453.030 – Consent to Adoption Required
4
Missouri Revisor of Statutes. Missouri Code 192.016 – Putative Father Registry
5
Missouri Department of Health and Senior Services. Notice of Intent to Claim Paternity and Putative Father Registry Information
6
Missouri Revisor of Statutes. Missouri Code 210.487 – Background Checks for Foster Families, Requirements
7
Missouri Department of Social Services. Child Welfare Manual Section 4, Chapter 9, Subsection 4 – Adoptive Placement and Support
8
Missouri Revisor of Statutes. Missouri Code 453.102 – Division to Inform Adoptive Parents of Postplacement Services
9
Missouri Revisor of Statutes. Missouri Code 453.010 – Petition for Permission to Adopt
10
Missouri Revisor of Statutes. Missouri Code 453.060 – Service on Parties
11
Missouri House of Representatives. Missouri Code 453.080 – Adoption Decree
12
Child Welfare Information Gateway. Adoption and Guardianship Assistance – Missouri
13
Internal Revenue Service. Notable Changes to the Adoption Credit
14
Missouri Department of Social Services. Child Welfare Manual Section 4, Chapter 2, Subsection 11 – ICPC