Reviewed for current 2026 law
Iowa Child Support Arrears Calculator
Model §§252C.6 and 535.3 without hiding the 30-day accrual rule or waiver authority.
Reviewed by SupportDecode Editorial Team Page content reviewed Sources Methodology Update log
arrears calculator
Estimated arrears with interest: $5,005.00
Interest of $5.00 at 0.1% simple per year (Iowa Code §§ 252C.6 and 535.3(2)).
| Line item | Amount |
|---|---|
| Arrears principalIowa Code § 252C.6 — interest on support debts and waiver authority (Iowa Legislature) | $5,000.00 |
| Simple interest at 0.1% per year for 12 month(s) (Iowa Code §§ 252C.6 and 535.3(2))Periodic child-support payments begin accruing 10% annual interest 30 days after they become due; Child Support Services may waive interest to facilitate collection.Iowa Code § 252C.6 — interest on support debts and waiver authority (Iowa Legislature) | $5.00 |
| Arrears principal plus interestIowa Code § 252C.6 — interest on support debts and waiver authority (Iowa Legislature) | $5,005.00 |
Assumptions
- Accrual period expressed as 12 month(s); partial months prorate.
Estimate only. The court or state agency calculation controls.
Iowa arrears interest under Iowa Code §§ 252C.6 and 535.3(2); rules last reviewed 2026-08-09.
Iowa applies 10% after 30 days
Periodic child, spousal, and medical support begins accruing interest 30 days after it becomes due.
Child Support Services may waive interest when doing so facilitates collection.
Start with the Iowa ledger
Use only principal old enough to accrue interest and remove waived amounts.
What this estimate includes
- Simple annual estimate
What it leaves out
- First 30 days
- Waiver decision
- Payment-by-payment allocation
Iowa arrears calculator FAQs
When does interest start?
Thirty days after a periodic payment becomes due.
What rate applies?
Ten percent annually.
Can CSS waive interest?
Yes, when waiver facilitates collection.
Does payroll timing create interest?
Not when delay is solely caused by a regular withholding pay cycle covered by the statute.
Does the tool model compounding?
No, it uses simple interest.
Is this an official payoff?
No; obtain the state ledger.
Official sources
Official sources last verified: .
- Iowa Code § 252C.6 — interest on support debts and waiver authority
Iowa Legislature Last checked
- Iowa Code § 535.3(2) — 10% support interest after 30 days
Iowa Legislature Last checked
Changelog: page reviewed . Material changes appear in the update log.