Total cost of raising a child broken into annual and monthly averages.

A 180,000 estimate across 18 years averages 10,000 a year or 833 a month. Real costs are bumpier — higher during early childcare years, teenage years, and university preparation. The average is a useful planning reference but understates peak years.

How to use it

Enter a total cost estimate for raising the child from birth to 18. Use 18 years as the default span (customise if needed for longer support). The tool splits into steady averages.

What the result means

Primary is annual average cost. Secondary shows monthly average, daily average, and the 'peak year' estimate (typically 20-40% above average during childcare or teenage phases).

Planning implications

If average monthly cost is 833, start a monthly savings pot pre-birth at that level to smooth the variable years. Building a buffer during cheaper years (middle childhood) funds the peaks (early years and teenage).

Quick example

With total cost estimate of 180,000 and years span of 18 years, the result is 10,000.00. Change any figure and watch the output shift — it's often more useful to see the pattern than to memorise the formula.

Which inputs matter most

You enter Total Cost Estimate and Years Span. Frequency and unit price pull the total in different directions. The biggest surprise for most people is how small recurring amounts compound into large annual figures — that's where this calculation earns its keep.

What's happening under the hood

Simple average — total divided by years. Peak-year estimate is the average uplifted by 30% (representative of early and teenage phases). Not jurisdiction-specific — use your own total estimate appropriate to your circumstances. The formula is listed in full below. If the number looks off, you can retrace the calculation by hand — that's the point of showing the working.

What the number doesn't include

Life events generate side costs: time off work, travel for guests, aftercare, lost weekends. The figure here covers the direct costs. Noting the indirect ones alongside avoids the post-event surprise.

What this doesn't capture

Life events generate side costs the figure doesn't include: time off work, lost income, travel for others, aftercare. Add 10–15% to the direct number as a buffer; the items you haven't thought of usually fill most of it.