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Dependant Cost Estimate Calculator

Work out dependant cost estimate instantly with clear inputs, formula shown and shareable results.

About Dependant Cost Estimate Calculator

The cost of supporting dependants over many years is dominated by inflation, not by the first year's figure. Comparing the nominal total against today's prices shows how much of the burden is purely price escalation.

Formula

Dependant cost

Total = Σ dependants × annual cost × (1 + inflation)^year

Worked example

With the default values below, Dependant Cost Estimate Calculator returns Total Cost Over The Support Period of $20,399,419.51. Change any input above and every figure here is recalculated in your browser.

Inputs used

Number Of Dependantsaccepts 1–10
2
Annual Cost Per Dependantminimum 0
300,000
Years Of Supportaccepts 1–40
18
Annual Cost Inflationaccepts 0–20 %
7 %

Results

Total Cost Over The Support Period
$20,399,419.51
Same Period At Today's Prices
$10,800,000.00
Additional Cost From Inflation
$9,599,419.51
Average Annual Cost
$1,133,301.08

Step by step

  1. 1Values used
  2. 2Dependant cost
  3. 3Total Cost Over The Support Period= 20,399,419.51
  4. 4Same Period At Today's Prices= 10,800,000.00
  5. 5Additional Cost From Inflation= 9,599,419.51
  6. 6Average Annual Cost= 1,133,301.08

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take tax into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Figures are estimates for planning only. Prices, returns, inflation and personal circumstances all change. This is not financial or tax advice — speak to a qualified adviser before making decisions.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Figures are estimates for planning only. Prices, returns, inflation and personal circumstances all change. This is not financial or tax advice — speak to a qualified adviser before making decisions.

Frequently Asked Questions

Why is the inflation effect so large?

Because the costs run for two decades. Even 7% inflation roughly doubles the annual figure within ten years.

Does this include education?

Only if the annual figure does. Education inflation usually runs above general inflation and may deserve its own projection.

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