Sum of all children's activity costs — sports, music, after-school clubs — into an annual total.

Swimming at 60/month, football at 40/month, music lessons at 80/month, scouts at 20/month: 200/month per child, or 2,400 annually. Two children: 4,800 a year. Over 10 years with some stopping and starting, typical totals 25,000-50,000 per child. Individually each activity feels small; in aggregate the investment in children's development is substantial.

How to use it

Enter monthly costs for up to 4 activities per child (swimming, football, music, scouts, etc.) and number of children. The tool sums across all children.

What the result means

Primary is total monthly activity cost for the household. Secondary shows annual, per-child average, and kit/equipment one-off annual estimate (typically 20-30% of monthly costs).

Hidden costs

Kit and equipment (boots, instruments, uniforms), travel to events, competition entry fees, and club trips. Annual add-ons are typically 20-40% of monthly fees. This tool's inputs should be the monthly fees only; add the annual kit cost on top.

Quick example

With activity 1 monthly of 60 and activity 2 monthly of 40 (plus activity 3 monthly of 80 and activity 4 monthly of 20), the result is 400.00. 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 Activity 1 Monthly, Activity 2 Monthly, Activity 3 Monthly, Activity 4 Monthly, and Number of Children. 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

Sum of four activity monthly costs times number of children. Does not model differences between children's activity lists — assumes each child does all four. For mixed schedules, use a weighted average of activity costs. 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.

Spreading the cost

Starting earlier always costs less per month than starting late. That's the main lever this tool surfaces. Whatever the total, dividing it by the months until the event gives a monthly target that's easier to build into a budget.

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.