Start with Tenn. Code Ann. § 36-5-101; Tennessee Child Support Guidelines. In Tennessee, Tennessee uses the Income shares and measures income as gross income. Tennessee’s income-shares guidelines use adjusted gross income, a basic obligation schedule, and a parenting-time adjustment based on days. Health insurance premiums and work-related childcare are added on the child support worksheet. That is the question this guide answers for how child support is calculated. Support generally ends when Support generally ends at 18, or upon high-school graduation if later, not past 19. Modification: Significant variance—generally 15% between the existing order and a recalculated guideline amount—supports modification.
Statutory framework and guideline model
Tennessee's child support system is built around Tenn. Code Ann. § 36-5-101; Tennessee Child Support Guidelines. Under the income shares, Tennessee’s income-shares guidelines use adjusted gross income, a basic obligation schedule, and a parenting-time adjustment based on days. Health insurance premiums and work-related childcare are added on the child support worksheet.
Federal law requires every state to maintain presumptive guidelines and to review them at least every four years (42 U.S.C. § 667). Confirm the latest Tennessee schedule or worksheet before relying on any online calculator.
How child support is calculated in Tennessee
- Identify each parent's guideline income using gross income as defined in Tenn. Code Ann. § 36-5-101; Tennessee Child Support Guidelines and the accompanying worksheets or administrative rules.
- Apply the income shares — whether that means a combined-income schedule, an obligor percentage table, or a Melson-style self-support reserve plus primary obligation.
- Allocate add-ons such as health insurance premiums, unreimbursed medical expenses, and work-related child care according to Tennessee practice.
- Consider parenting time adjustments where the guidelines or case law authorize a credit or shared-custody formula.
- Test for deviation if a strict guideline result would be unjust or inappropriate on the record.
Online calculators can illustrate ranges, but only the controlling statute, guidelines, and court findings produce an enforceable order.
How the Tennessee rule applies
Apply the Tennessee authorities in order. The facts are simplified so the statute and the standard are visible.
Two parents in Tennessee need a presumptive child-support figure and may have facts that justify a departure.
- Measure guideline income as gross income under Tenn. Code Ann. § 36-5-101; Tennessee Child Support Guidelines.
- Apply the Income shares: Tennessee’s income-shares guidelines use adjusted gross income, a basic obligation schedule, and a parenting-time adjustment based on days. Health insurance premiums and work-related childcare are added on the child support worksheet.
- Test deviation: Deviation requires written findings and may reflect extraordinary expenses or other guideline factors.
- If circumstances later change: Significant variance—generally 15% between the existing order and a recalculated guideline amount—supports modification.
The enforceable number is the Tennessee guideline result under Tenn. Code Ann. § 36-5-101; Tennessee Child Support Guidelines, plus any deviation findings. Child Support Enforcement uses income assignment, intercepts, and contempt.
Deviation from the guidelines
Deviation requires written findings and may reflect extraordinary expenses or other guideline factors.
When a court departs from the presumptive amount, Tennessee practice generally requires findings that explain why the guideline figure is unjust or inappropriate and what amount better serves the child's needs. Those findings matter on appeal and in later modification proceedings.
Modification of child support
Significant variance—generally 15% between the existing order and a recalculated guideline amount—supports modification.
A parent seeking a change typically must show that circumstances after the prior order make the existing award inequitable. Common triggers include job loss, substantial income changes, a new parenting-time schedule, emancipation of a child, or extraordinary medical needs. Retroactivity and temporary relief rules are statute-specific — check Tenn. Code Ann. § 36-5-101; Tennessee Child Support Guidelines and local family-division procedures.
Enforcement in Tennessee
Child Support Enforcement uses income assignment, intercepts, and contempt.
Interstate cases often implicate UIFSA. Income withholding, contempt, license suspension, and tax-refund intercept remain core tools nationwide, but the Tennessee child support agency and clerk of court procedures control day-to-day collection.
When child support ends
In Tennessee, Support generally ends at 18, or upon high-school graduation if later, not past 19. Orders may extend for disability, secondary education, or other statutory grounds where the statute allows. Always read the judgment language — agreed orders sometimes set a different end date or require a notice of emancipation.
Case law: how Tennessee courts apply the guidelines
The opinions below are in the LawDiver corpus. Each block quote is taken from the opinion text so you can jump from this guide into the full decision.
Betty BERRYHILL v. Charles Thomas RHODES
Betty BERRYHILL v. Charles Thomas RHODES, 2000 Tenn. LEXIS 286 (2000)
…may enter into a private agreement regarding the payment of child support outside the Child Support Guidelines; (2) whether the evidence preponderates against an award of retroactive child support in excess of the amount agreed upon by the parties; and (3) whether the plaintiff rebutted the presumption that a two-year average of income should be used to determine the amount of…
Betty BERRYHILL v. Charles Thomas RHODES is worth reading on Tennessee child support because the court put the point in its own words: "may enter into a private agreement regarding the payment of child support outside the Child Support Guidelines; (2) whether the evidence preponderates against an award of retroactive child support in excess of the amount agreed upon by the parties; and (3) whether the plaintiff r" Use that passage as the starting point, then read the facts that precede it.
Dorothy Caroline JONES, Plaintiff-Appellee, v. Curtis Lamar JONES, Defendant-Appellant
OPINION DROWOTA, Justice. This child support case presents a single issue for our consideration: whether the trial court erred in finding that the child support guidelines were inapplicable, and thereafter setting the child support at an amount approximately 30% less than that called for in the guidelines. For the reasons that follow, we conclude th…
On child support, Dorothy Caroline JONES, Plaintiff-Appellee, v. Curtis Lamar JONES, Defendant-Appellant speaks to the Tennessee dispute in this passage: "This child support case presents a single issue for our consideration: whether the trial court erred in finding that the child support guidelines were inapplicable, and thereafter setting the child support at an amount approximately 30% less than that called for in the guidelines." The surrounding opinion shows how the court applied that language to the record.
Robert McAlister BARNETT, III v. Paula Lynn BARNETT
Robert McAlister BARNETT, III v. Paula Lynn BARNETT, 2000 Tenn. LEXIS 466 (2000)
…06 an extraordinary educational expense under the Tennessee Child Support Guidelines; and 2) whether the noncustodial parent should be required to pay those expenses in addition to child support based upon the percentage of net income of the noncustodial parent. We hold that pursuant to the Tennessee Child Support Guidelines private school tuition is an “extraordinary education…
On child support, Robert McAlister BARNETT, III v. Paula Lynn BARNETT speaks to the Tennessee dispute in this passage: "Tennessee Child Support Guidelines; and 2) whether the noncustodial parent should be required to pay those expenses in addition to child support based upon the percentage of net income of the noncustodial parent." The surrounding opinion shows how the court applied that language to the record.
Child Support Svcs. v. Russell
Child Support Svcs. v. Russell (1998)
…an order requiring Mr. Russell to pay $130.00 per month for child support and to pay $43.33 per month on a $3,567.00 arrearage. Mr. Russell immediately filed a series of motions seeking to have his child support reduced because he was disabled and the child would begin receiving support through Social Security. On October 13, 1995 the Referee ruled that “as long as Mr. Russell…
Tennessee opinions such as Child Support Svcs. v. Russell are cited where child support is disputed. The court stated: "Mr. Russell to pay $130.00 per month for child support and to pay $43.33 per month on a $3,567.00 arrearage. Mr." That is the language to brief; the rest of the decision supplies the procedural posture.
Lester G. Murphy, Sr. v. State of Tennessee Child Support Services
Lester G. Murphy, Sr. v. State of Tennessee Child Support Services (2014)
…5, 2013 Session LESTER G. MURPHY, SR. V. STATE OF TENNESSEE CHILD SUPPORT SERVICES Appeal from the Juvenile Court for Humphreys County No. J851107 Anthony L. Sanders, Judge No. M2012-02514-COA-R3-JV - Filed April 29, 2014 A mother and father divorced and the trial court ordered the father to pay the mother $50 a week as support for their two children. The children subsequently…
On child support, Lester G. Murphy, Sr. v. State of Tennessee Child Support Services speaks to the Tennessee dispute in this passage: "Session LESTER G. MURPHY, SR. V. STATE OF TENNESSEE CHILD SUPPORT SERVICES Appeal from the Juvenile Court for Humphreys County No. J851107 Anthony L. Sanders, Judge No." The surrounding opinion shows how the court applied that language to the record.
Freeman, Joshua v. Certified Maintenance, Service, Inc.
Freeman, Joshua v. Certified Maintenance, Service, Inc., 2022 TN WC 56 (2022)
…Child Care $ per month Transportation $ ________ per month Child Support $ per month Car $_________ per month Other $ _______ per month (describe: ) 10. Assets: Automobile $ (FMV) Checking/Savings Acct. $ House $ (FMV) Other $ Describe: 11. My debts are: Amount Owed To Whom I hereby declare under the penalty of perjury that the foregoing answers are true, correct, and complete…
Practitioners open Freeman, Joshua v. Certified Maintenance, Service, Inc. when Tennessee child support turns on the distinction in this sentence: "Child Care $ per month Transportation $ ________ per month Child Support $ per month Car $_________ per month Other $ _______ per month (describe: ) 10. Assets: Automobile $ (FMV) Checking/Savings Acct. $ House $ (FMV) Other $ Describe: 11." Do not lift it out of the facts the court was deciding.
Practical checklist for Tennessee child support matters
- Gather recent pay stubs, tax returns, and proof of health insurance / child-care costs.
- Complete the current Tennessee worksheet or financial affidavit required by the local court.
- Document parenting-time overnights if a shared-custody adjustment may apply.
- Flag facts that could support deviation (special needs, travel costs, high income, other children).
- Search LawDiver for recent Tennessee appellate decisions before mediation or trial.
Key takeaways
- Tennessee follows the Income shares model for presumptive child support.
- Income is generally measured using gross income, then allocated under Tenn. Code Ann. § 36-5-101; Tennessee Child Support Guidelines.
- Guideline amounts are presumptive, not automatic — courts may deviate when the facts justify it.
- Support generally ends at 18, or upon high-school graduation if later, not past 19.
- Either parent can seek modification when significant variance—generally 15% between the existing order and a recalculated guideline amount—supports modification..
- Read the companion guide: Tennessee alimony / alimony.
Frequently asked questions
How is child support calculated in Tennessee?
Tennessee uses the income shares under Tenn. Code Ann. § 36-5-101; Tennessee Child Support Guidelines. Courts start with gross income, apply the guideline schedule or percentage, allocate add-ons, and may deviate with findings when the presumptive amount is unjust.
What income counts for Tennessee child support?
Guideline income generally tracks gross income as defined by Tenn. Code Ann. § 36-5-101; Tennessee Child Support Guidelines and the worksheets. Wages, self-employment income, bonuses, and certain benefits are commonly included; exact deductions and exclusions are statute-specific.
Can Tennessee courts order more or less than the guideline amount?
Yes. Guideline support is presumptive. Judges may deviate when the record shows the guideline result is unjust or inappropriate, typically with written findings explaining the departure.
How do I modify a Tennessee child support order?
Significant variance—generally 15% between the existing order and a recalculated guideline amount—supports modification. File in the court with continuing jurisdiction (or follow UIFSA for interstate cases) and support the request with current financial evidence.
When does child support end in Tennessee?
Support generally ends at 18, or upon high-school graduation if later, not past 19. Confirm any disability, educational, or agreed extensions in your particular order.
Where can I research Tennessee child support case law?
Use LawDiver search scoped to Tennessee, or open the opinions linked in this guide. Companion reading: Tennessee alimony guide.
Disclaimer
This guide is general legal information about Tennessee child support, not legal advice. Statutes, guidelines, and case law change. Confirm the current text of Tenn. Code Ann. § 36-5-101; Tennessee Child Support Guidelines and consult a licensed Tennessee family-law attorney about your facts.