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HomeGuidesLawFamily lawChild support

Divorce and child support — when the court decides and how to change it

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Child support calculator for a child — estimated amount

Table of contents

  • When the court decides child support in divorce
  • Interim support during proceedings — when and how
  • Child support in the divorce judgment — what it covers
  • Changing support after judgment (Art. 138 KRO)
  • Child support calculator — how it works
  • Sources
  • Frequently asked questions (FAQ)

In divorce proceedings, the court can decide child support and, in some cases, spousal support. Two moments are crucial: interim support during the case and the final divorce judgment that sets the obligation and amount. Below is a practical guide.

When the court decides child support in divorce

Child support can be decided in the divorce judgment. This means you do not need a separate child‑support case if you include the claim in the divorce petition. If the claim is not included, a separate support case remains possible.

Courts apply the same criteria as in a standard support case: the child’s needs and the parent’s earning capacity. The actual care arrangement and each parent’s in‑kind contribution also matter. See: Child support amounts: criteria and rules.

It is worth preparing a cost breakdown and evidence before filing. Well‑documented expenses (education, health, activities) make the decision more predictable.

If the other parent runs a business, works irregularly or has variable income, collect evidence of real earning capacity such as transfers, contracts or indicators of living costs. Courts look at declared income and actual capacity.

If the divorce petition includes a child‑support claim, attach:

  • a monthly cost summary,
  • receipts and invoices for expenses,
  • school and medical documents,
  • proof of parents’ income,
  • confirmations of fixed household costs.

Missing documents do not end the case, but they often slow it down and make interim support harder to obtain. A clear cost breakdown that shows who pays which expenses is especially helpful.

If the case includes a claim for spousal maintenance, the court will look at the parties’ financial situation, need or significant deterioration of the spouse’s situation, and issues of fault in the breakdown. See: Spousal maintenance — rules, limits and examples.

Interim support during proceedings — when and how

If the divorce case takes time, you can request interim support. This is a fast measure designed to secure funds for the child before the final judgment. The request can be included in the divorce petition or filed separately during the case.

The request should show:

  • the child’s needs and monthly costs,
  • the obligor’s earning capacity,
  • evidence in the form of receipts, contracts and certificates.

Courts usually expect a cost breakdown and basic documents. More details: Interim child support before judgment.

An interim order is temporary and does not determine the final amount in the judgment. It can be adjusted if circumstances change.

Interim support is especially important when ongoing costs cannot wait for the judgment, such as medical care, rehabilitation or high education expenses. It helps to describe whether and how the other parent currently contributes during the proceedings.

Child support in the divorce judgment — what it covers

The divorce judgment can specify:

  • who pays and how much,
  • from which date the obligation applies,
  • how the payment should be made.

In practice, the court also considers custody arrangements and how costs are shared between parents. With alternating custody, amounts may be lower or structured differently. A clear cost breakdown and description of care responsibilities help the court assess the real situation.

Child support for a child does not depend on fault in the marital breakdown. Courts focus on the child’s needs and the parents’ capacity, so evidence of costs matters most.

If the parents reach an agreement on support, courts usually accept it if it protects the child’s interests. Agreements should be backed by a realistic cost breakdown and the parties’ actual capacity.

It helps if the agreement states a clear payment method and timing, which later supports accounting and enforcement if needed.

Courts often compare the parties’ proposals against documents. If part of the costs are paid directly (for example activities or equipment), it helps to describe them in the cost breakdown to avoid discrepancies.

Changing support after judgment (Art. 138 KRO)

After the judgment, you can request a change if circumstances materially change. Typical reasons include:

  • higher child‑related costs,
  • a change in health,
  • an increase or decrease in a parent’s income,
  • a change in care arrangement.

This usually means a claim to increase or reduce support. See: Increase of child support — when and how and Reduction or termination of child support.

If support is not paid, enforcement and the support fund may apply: Non‑payment of child support — enforcement and bailiff and Alimony fund — when it applies.

A successful change request is usually well‑documented. Keep income proofs, medical documentation and cost evidence, and show when the change became lasting and significant.

When asking for a change, attach an updated cost breakdown and a comparison with earlier costs. A simple before‑and‑after table often clarifies the scale of the change.

Child support calculator — how it works

A preliminary estimate can be done in the child support calculator. It is a helper tool and should be compared with your cost breakdown and evidence. The result is not binding for the court, but it helps evaluate whether the requested amount is realistic.

The calculator does not reflect every nuance, such as special health needs or travel expenses. Treat it as a reference point, not a final answer.

It does not replace an individualized assessment of the child’s and parents’ situation.

If you are unsure whether your request is well supported, prepare a short summary of costs and attach key evidence. This often speeds up legal consultations and court review.

Sources

  • Family and Guardianship Code (ISAP)
  • Code of Civil Procedure (ISAP)
  • Ministry of Justice - official information

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Frequently asked questions (FAQ)

Czy alimenty można ustalić już w sprawie rozwodowej?+
Tak, sąd może orzec o alimentach na dziecko w wyroku rozwodowym.
Czy można dostać alimenty na czas trwania procesu?+
Tak, można złożyć wniosek o zabezpieczenie alimentów na czas postępowania.
Jak zmienić alimenty po wyroku rozwodowym?+
Składa się pozew o podwyższenie/obniżenie alimentów przy istotnej zmianie okoliczności (art. 138 KRO).
Co zrobić, gdy rodzic nie płaci alimentów?+
Można skierować sprawę do komornika i egzekwować należność na podstawie tytułu wykonawczego.

Related calculators

  • Child support calculator for a child — estimated amount

Related guides

  • Child support amounts: criteria and rules
  • Child support petition: how to file step by step
  • Interim child support before judgment
  • Increase of child support: when and how
  • Reduction or termination of child support
  • Non‑payment of child support: enforcement and bailiff

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Choose a law firm for your case

Compare firms by specialization, city, and ratings. You contact the selected firm directly.

Kancelaria Alfa

Warszawa5.0 (1 review)

Sprawy rodzinne i cywilne: rozwod, alimenty, podzial majatku, reprezentacja w sadzie.

Practice areasFamily lawCivil law
AddressRegulska 40

Lex Biz Kancelaria

Krakow5.0 (1 review)

Obsluga JDG i spolek: umowy, podatki, kontrole, sprawy pracownicze.

Practice areasLabor lawTax law

Nieruchomosci Partner

Gdansk5.0 (1 review)

Zakup i sprzedaz nieruchomosci, umowy deweloperskie, najem, spory o nieruchomosci.

Practice areasCivil lawReal estate law

Tax Guard

Poznan5.0 (1 review)

Doradztwo podatkowe i legal support dla biznesu: VAT, CIT, kontrole, umowy B2B.

Practice areasTax lawBusiness law

Civil Pro

Lodz5.0 (1 review)

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