Child support amount looks wrong? Before you challenge the number, determine which number you are disputing: the current monthly support amount, the claimed arrears balance, or both. Those numbers are built from different records and can be wrong for different reasons.

A useful child support audit reconstructs the number from the signed orders forward. It turns “this cannot be right” into a specific, documented discrepancy that can actually be investigated.

Child support amount wrong? Start with the current court-ordered amount

Get the most recent signed support order. Record the current support amount, effective date, payment frequency, medical support, arrears payment if any, and other amounts the order requires.

Do not use an agency notice as a substitute for the court order when the actual order is available. You need the source document before comparing what is being collected.

Step 2: Build the complete order history

Find every order that established or changed support. Make a simple table with the order date, effective date, monthly amount, arrears payment, and any other change.

This becomes your charging history. Without it, a later payment ledger can be almost impossible to audit accurately.

Step 3: Review the guideline calculation

Find the worksheet or findings used to calculate support. Check the income figures, childcare, health insurance, parenting-time adjustments, other children, imputed income, deviations, and other inputs used in your jurisdiction.

If an input appears wrong, identify the supporting document for the correct figure. “My income was $X according to this pay record” is more useful than simply saying the final support amount was unfair.

Step 4: Obtain the transaction-level payment ledger

Ask for the official payment history showing charges, payments, credits, adjustments, arrears, interest where applicable, and other transactions. A single current balance is not enough for a meaningful audit.

Compare the ledger month by month with the order history and effective dates.

Step 5: Compare wage withholding with credited payments

If money was taken from your wages, gather pay stubs and employer records showing the date and amount of each deduction. Compare those deductions with the payments credited on the child support ledger.

Do not assume every payroll deduction and agency credit will appear on the exact same date. Look for unexplained missing amounts, duplicates, or persistent differences and document them.

Step 6: Identify direct payments, credits, and adjustments

If direct payments were made, determine how your jurisdiction treats them and whether they were credited. Gather receipts, canceled checks, bank transfers, money-order records, or other reliable proof.

Also identify adjustments or reversals on the official ledger. If you do not understand an entry, ask what transaction or authority produced it rather than guessing.

Step 7: Separate an order problem from an accounting problem

If the signed order itself used an income figure you dispute, that is different from an agency ledger failing to credit a payment. A modification issue is also different from a mathematical error in the ledger.

Keep each category separate: order/calculation, payments/credits, arrears accounting, and enforcement. This prevents one disagreement from swallowing the entire review.

Step 8: Build a discrepancy sheet

Create columns for date, expected charge, actual ledger charge, payment made, payment credited, difference, and supporting document. Add a short explanation for each discrepancy.

For example: “Order effective May 1 sets support at $600, but ledger charges $750 in May and June.” That is a testable record question.

Step 9: Check modifications and effective dates carefully

A later modification may not take effect on the date you expected. Record both the date the request was filed and the effective date stated in the order. Retroactive modification of accrued support is restricted by federal law and state procedure, so do not simply recalculate past months using today’s amount.

Step 10: Compare the court record with enforcement records

If an income-withholding notice, lien, license notice, tax intercept, or collection letter uses a balance or monthly amount, compare it with your reconstructed order and payment history.

The goal is to identify exactly where the numbers diverge—not to assume that every difference proves misconduct.

If the problem is affordability rather than an incorrect calculation

If the original number was correctly calculated but your income later dropped, you may have a modification problem rather than an accounting error. Read Can’t Afford Child Support? What Records to Review Before Your Next Hearing.

Turn “the balance is wrong” into a documented question

“The balance is wrong” is an assertion. “The signed order changed support to X on this date, but the ledger continued charging Y for these months” is a record-based discrepancy. The second statement tells you what document to request, what calculation to verify, and what question needs an answer.

Child support amount wrong? Build the audit before you challenge it

Start free: download the Fathers Unchained Docket & Document Checklist so you can collect the orders, worksheets, payment history, and enforcement records needed for the audit.

Found a number that doesn’t match? Stop guessing and build a document-by-document audit you can actually explain. Use the Record Review & Authority Analysis Kit to organize discrepancies, connect them to the underlying documents, and identify the authority you need to research before challenging the amount.

Fathers Unchained provides legal education and record-review tools, not legal advice. Child-support calculations, credits, interest, modification rules, and accounting procedures vary by jurisdiction.