Inputs you need for Alimony Child Support in Philippines

6 min read

Published April 15, 2026 • By DocketMath Team

Inputs you will need

Run this scenario in DocketMath using the Alimony Child Support calculator.

Before you run DocketMath’s alimony-child-support calculator for the Philippines (PH), gather the core “data pieces” courts commonly consider in support-related matters—especially for children. The calculator can help you model scenarios based on the information you have. (This is for planning and discussion, not legal advice or a court determination.)

In general, you’ll want inputs in these categories:

  • Case basics

    • Relationship status: married / separated / annulment / legal separation / other
    • Relevant timing (at least one, if available)
      • Date of separation (or the date of filing, if that’s what you have)
      • Date(s) of child birth (or current age)
  • **Children’s details (key for child support modeling)

    • Number of children
    • For each child:
      • Birthdate (or current age)
      • Whether the child is still a minor (the calculator may treat “minor vs. not” as a key switch)
  • **Parties’ basic information (to ensure the tool assigns roles correctly)

    • Who the paying parent is (name optional; role matters)
    • Who the receiving parent/guardian is
    • Optional: approximate living arrangement (useful if the tool asks)
  • **Income inputs (usually the biggest driver of results)

    • Paying parent’s income
      • Monthly gross income (salary, business/net, or combined—use whatever the tool specifies)
      • Any consistent additional monthly income (e.g., commissions, allowances)
    • Receiving parent’s income (if the tool includes it)
      • Monthly gross income (if you know it)
  • **Child-related expense inputs (only if the calculator prompts for them)

    • Claimed/estimated necessities for the child (commonly education, health/medical, and basic living)
    • Other obligations that materially affect ability to pay (only include if you have figures)
  • **Support preferences / assumptions (if the tool supports them)

    • Payment frequency preference (usually monthly)
    • Cost adjustments/expense inclusion (e.g., whether to include child-specific expenses you know; yes/no)
  • Optional but often useful

    • Insurance or recurring medical costs for the child (monthly estimate)
    • Current school expenses (monthly estimate)

Tip: If you’re missing an input, start with the “best available” value and note what you’re uncertain about. Then run 2–3 scenarios to see how sensitive the estimate is.

Where to find each input

Use these “where to look” ideas to assemble your numbers quickly from documents you likely already have.

Most inputs live in the case file, contracts, or docket entries. Dates usually come from the triggering event notice; rates and caps come from governing documents or statute; and amounts come from the ledger or judgment. Record the source for each value so the run is reproducible.

1) Children’s details

Best sources for accurate ages/birthdates:

  • Birth certificates (best source for exact birthdates)
  • Government child records (if birth certificates aren’t handy)
  • School records (often show birthdate/age)

Checklist

2) Income inputs

Income is usually the largest input category, so try to keep it consistent and defensible.

Paying parent income sources

  • Latest pay slips (salary + regular allowances + commissions if consistently reflected)
  • Employment contract (for structured pay)
  • BIR-related figures / bookkeeping summaries for self-employed income (if you have them)
  • Bank statements (use monthly averages only if payroll docs are missing)

Receiving parent income sources (if the tool asks for it)

  • Pay slips or employment income summaries
  • Self-employed income figures (monthly average)
  • Only include “benefits” that the calculator treats as income if it asks for them

Checklist

3) Child-related expense inputs (only if prompted)

When the calculator asks for child expense inputs, look for:

  • Tuition receipts and school invoices
    • If tuition is billed per term, convert to a monthly average (unless the calculator uses a different unit)
  • Medical prescriptions and clinic/hospital statements
  • Pharmacy receipts for ongoing medication
  • Household/child budget figures you can defend with numbers (e.g., transportation, childcare)

Checklist

4) Case basics and timing

You may not need every detail, but gather what you can:

  • Date of separation
    • separation agreement, affidavits, or correspondence
  • Filing dates
    • copies of petitions/complaints/receipts or notices

Checklist

Run it

Once you’ve collected the inputs, you’re ready to model results with DocketMath.

  1. Open the tool: /tools/alimony-child-support
  2. Enter the required PH inputs:
    • Children: number + ages/birthdates
    • Incomes: monthly gross for the paying parent (and receiving parent if the tool includes it)
    • Any child expense fields the calculator requests
    • Any assumptions/preferences shown in the form
  3. Review the outputs and test how they change with different assumptions.

How outputs change when you adjust inputs

Use this “scenario thinking” while running:

Input you changeWhat usually happensWhy it changes
Paying parent monthly gross income increasesSupport estimate increasesAbility to pay generally tracks income
Child age switches (minor vs. not)Support assumptions may changeCoverage/eligibility often depends on age/status
Number of children increasesTotal support estimate increasesAllocation typically scales with number of children
Adding monthly education/medical expensesSupport estimate increasesCertain expenses may be treated as necessary costs
Receiving parent income increasesSupport estimate may decrease or shiftModeling can reflect relative need and contribution

Important consistency checks (avoid common modeling errors)

  • Don’t mix net and gross income.
    If pay slips show gross pay, use gross consistently. If you only have net, double-check whether the calculator asks for gross explicitly.
  • Make sure all ages are aligned to the same “as-of” date.
    If you estimate ages differently, results can drift.
  • Use matching time units.
    Expense amounts should be monthly (or converted to monthly) unless the calculator uses another structure.

When you’re satisfied, run the calculation and compare results across 2–3 scenarios—for example: “baseline,” “higher expenses,” and “lower income”—to understand what matters most.

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