How Long Does It Take to Get a Court-Ordered Paternity Test?

A court-ordered paternity test usually takes about two to three months from the day the petition is filed to the day the judge signs a final order, assuming both parties cooperate. When the alleged father contests the case, cannot be located, or refuses to submit a sample, the timeline commonly stretches to six months or longer. The process moves through a fixed sequence, and a delay at any single step pushes everything that follows.

Where the Time Actually Goes

The clock starts when someone, usually a parent or a state child support agency, files a petition in family court. Federal law requires every state to allow paternity to be established at any point before the child turns 18.¹ After filing, the other party has to be formally notified through service of process. A sheriff’s deputy, private process server, or certified mail carrier delivers the papers. If the alleged father is easy to find, service takes a few days to a couple of weeks. If he is not, it can take months.

Once service is complete, the court schedules a hearing. Local backlogs drive this wait more than anything else. Some courts can get you in within two weeks; busier jurisdictions schedule months out. The hearing itself is short. The judge listens, and if paternity is disputed, signs an order requiring the child, the mother, and the alleged father to submit to genetic testing. Federal law requires courts to order testing in contested cases when either party files a sworn statement supporting or denying sexual contact.¹

After the order is signed, the parties schedule sample collection at an accredited laboratory. Federal law only allows genetic test results into evidence when the lab is approved by an accreditation body designated by the Secretary of Health and Human Services.¹ In practice that means AABB-accredited facilities, the only body with standards built specifically for parentage testing.²

The collection itself is quick. A technician swabs the inside of each person’s cheek. What takes the time is the chain-of-custody protocol: an unrelated collector witnesses the whole thing, every participant shows government-issued photo ID, and the sealed samples ship under controlled conditions. These safeguards are what separate a legally admissible test from a drugstore kit, and they are non-negotiable.

How Long the Lab Takes

Top-tier accredited labs can analyze samples and return results in as little as one to two business days after receiving them. When testing is routed through a county child support office or a slower facility, results can take four to six weeks. Most court-ordered cases fall in the two-to-four-week range once you account for scheduling the appointment, getting everyone to show up, and waiting for the lab report.

Receiving the Final Ruling

The lab sends its official report directly to the court and the parties’ attorneys. Paternity tests produce a probability of paternity, and the standard threshold for a positive finding is 99.9% or higher. Federal law requires states to create a presumption of paternity when genetic testing crosses a specified probability threshold, and judges treat results at that level as essentially conclusive.¹ The judge then issues a final order, usually within a week or two of receiving the results. Results come in without expert testimony unless someone filed a written objection beforehand.

What Stretches the Timeline

Cooperation is the single biggest variable. When both sides show up on time and don’t fight the process, the case can wrap in six to eight weeks. The common causes of delay:

The alleged father cannot be located. If he can’t be served, the filing party may need alternative service methods or a skip-tracing service. Weeks or months.
Court backlogs. Some family courts are months behind. There is nothing you can do except file your paperwork correctly the first time so nothing gets kicked back.
Refusal to test. A court order is not a suggestion. If the alleged father refuses to submit a sample, the most common outcome is a default judgment: the judge rules he is the legal father without any DNA results at all. Courts can also hold him in contempt, which carries fines and, in some jurisdictions, jail time. But getting there requires the filing party to go back to court, file a motion to compel or for contempt, wait for another hearing date, and wait for the judge to act. This back-and-forth can add months.
Multiple alleged fathers. When more than one man may be the biological father, the court orders testing for all of them. Coordinating schedules and waiting for multiple lab reports extends the case.
A presumed father in the picture. If the mother was married when the child was born, every state presumes her husband is the father. The presumption also covers children born within roughly 300 days after a divorce or the husband’s death. It can be challenged, but the court has to address the presumption before ordering genetic testing, which means additional hearings. Cases involving a presumed father who objects to being displaced run longer than cases where no such presumption exists.
Retesting. Either party can request a second test if the first results are contested, though the person requesting it must pay in advance.¹

The Faster Alternative When Both Parents Agree

Not every paternity question needs a court case. Federal law requires every state to offer a simple civil process for voluntary acknowledgment of paternity, including a hospital-based program around the time of birth.¹ Signing the form is free and skips the court timeline entirely. A signed voluntary acknowledgment carries the same legal weight as a court judgment of paternity.

The tradeoff: by signing, both parents give up the right to genetic testing and a trial. Either parent can rescind within 60 days. After that window closes, the only way to challenge it is by proving fraud, duress, or a material mistake of fact, and the burden sits on whoever is challenging it.¹ Child support obligations continue during any challenge unless the court finds good cause to suspend them. If there is any doubt about biology, testing before signing is far easier than trying to undo an acknowledgment later.

At a Glance

Here is what each phase typically looks like when things go smoothly versus when they do not:

Filing and service of process. One to four weeks if the alleged father is easy to find. Weeks to months if he is not.
Waiting for the court hearing. Two weeks to several months, depending entirely on local court schedules.
DNA sample collection. Usually scheduled within one to two weeks of the court order, assuming everyone cooperates.
Lab analysis. One to six weeks, depending on the lab. Most cases land in the two-to-four-week range.
Final ruling. One to two weeks after the court receives the results.

In a cooperative case with a reasonably efficient court, the whole process finishes in two to three months. A contested case with an uncooperative party or a backed-up docket can easily run six months or longer. The most effective thing either party can do to speed things up is show up on time, respond to documents promptly, and comply with every court order without resistance.

1
Office of the Law Revision Counsel. 42 USC 666 – Requirement of Statutorily Prescribed Procedures to Improve Effectiveness of Child Support Enforcement
2
AABB. Become AABB-Accredited – Relationship (DNA) Testing