Expense Tracking for Co-Parents: A Complete Guide

One of the most common sources of conflict in co-parenting is money. Tracking shared expenses clearly and consistently prevents misunderstandings and creates a reliable record if disputes arise. This guide covers what to track, how to split costs, and the tools that make it easy.

What Expenses to Track

Regular expenses: school fees, uniforms, childcare, extracurricular activities, healthcare, and transportation. Extraordinary expenses: medical bills, dental treatment, therapy, school trips, and other one-off costs. Both UK child maintenance and US child support guidelines recognise these categories.

How to Split Costs

Common models include 50/50 splits, income-proportionate splits (each parent pays based on their income ratio), and alternating responsibility for categories (one parent covers school, the other covers activities). Whatever model you choose, document it clearly in your co-parenting plan and track every expense against it.

Tools for Tracking

A dedicated expense tracking tool is better than spreadsheets or memory. Larkling's free tier includes view-only expense tracking. Premium adds the ability to create, split, and settle expenses — with a full timestamped history. Receipts and records are stored alongside each expense entry, creating a complete audit trail.