The cost of a DNA test in Illinois is highly variable, depending entirely on the purpose and the specific type of genetic analysis required. For most people seeking clarity on a biological connection, the primary focus is relationship testing, most often paternity testing. Prices fluctuate based on whether the results are for personal knowledge or for use in the Illinois court system. Understanding these differences is the first step in determining the final cost.
Variables That Determine the Final Cost
The most significant factor influencing the price is the intended use of the results, which dictates the necessary collection and documentation procedures. A basic, at-home paternity test kit typically represents the lowest cost option, with prices ranging from approximately $89 to $240. These kits utilize a simple cheek swab collection method and are processed quickly, but they lack the legal documentation required for court.
The cost also changes based on the type of relationship being tested. For example, complex sibling, grandparentage, or avuncular (aunt/uncle) tests generally begin around $299 to $320 because they require more extensive analysis of shared genetic markers. The number of individuals involved may also increase the total price.
Another major determinant is the speed of results. While standard turnaround time for a non-legal test is usually two to five business days once the lab receives the samples, paying a rush fee can often reduce this wait to as little as 24 hours. The highest cost is reserved for non-invasive prenatal paternity (NIPP) tests, which can range from $1,099 to $2,000 because they analyze the fetal DNA found in the mother’s blood sample.
Legal Paternity Testing Requirements in Illinois
When DNA test results are required for official matters in Illinois, such as child support, custody, or birth certificate amendments, the cost increases significantly. A court-admissible paternity test typically costs between $295 and $600. This higher price is directly tied to the requirement for a strict “Chain of Custody” procedure.
Chain of Custody ensures the integrity of the samples by requiring a professional, neutral third party to perform the collection, verify the identity of all participants, and meticulously document the entire process. This formal collection process prevents any possibility of tampering or misidentification, making the results admissible in Illinois courts. The test must also be performed by a laboratory accredited by the American Association of Blood Banks (AABB).
Illinois courts require the genetic testing report to demonstrate a minimum of 99.9% probability of paternity to be accepted as legal evidence. Although the individual usually pays the upfront cost, the court has the authority to order the parties to split the expense or order cost coverage for indigent parties in certain cases.
Where to Find Testing Services and What to Expect
DNA testing services in Illinois are available through a variety of providers, including national laboratory chains, local collection clinics, and physician offices that partner with accredited labs. The standard method for collecting the DNA sample is a non-invasive buccal swab. This simple process is quick and painless for participants of all ages.
For a legal test appointment, participants must bring valid government-issued photo identification and a copy of any relevant court order. Once the samples are collected, they are sealed, labeled, and shipped to the laboratory for analysis. The final report is then sent to the ordering party or directly to the court.