Inheritance Invested vs Spent Calculator

Inheritance invested vs spent calculator quantifies the long-term financial impact of inherited wealth decisions. 100k inheritance invested at 7% over 20 years = 386,968 vs 100k spent today (0 future value). Massive long-term difference. Of course, immediate use can have life-changing value too - debt payoff, home purchase, family experiences.

Example: 100,000 inheritance. Option A: invest at 7% for 20 years = 386,968 future value (287k gain). Option B: spend on home renovation, holidays, debt payoff. Future value: 0 from spending but possibly 20-50k from satisfaction/utility (subjective). Investment wins financially but spending may win on life value.

A commonly cited decision framework runs in rough priority order: high-interest debt, where the effective return from clearing it is 15-25%; an emergency fund of 3-6 months of expenses; partial mortgage paydown at a 4-7% fixed return; retirement or other long-term investing; tax-advantaged education savings for children or grandchildren where available; and charitable giving, which can carry tax benefits in some jurisdictions. A frequently noted pattern is that a large share of an inheritance is spent within the first couple of years, so many beneficiaries spread the decision over time rather than acting immediately.

A worked example

With the defaults: inheritance amount of 100,000, expected annual return of 7%, investment period of 20 years, alternative use subjective value of 30,000. The tool returns 386,968.45. You can adjust any input and the result updates as you type — no submit button, no reload. That's the real power here: seeing how sensitive the output is to one or two assumptions.

What moves the number most

The result responds to Inheritance Amount, Expected Annual Return %, Investment Period, and Alternative Use Subjective Value. The rate and the time horizon usually dominate — compounding means a small change in either reshapes the final figure more than a similar shift in contribution size. Test this by doubling one input at a time.

The formula behind this

Future value of inheritance compounded at expected return rate. Everything the calculator does is shown in the formula box below, so you can check the math against your own spreadsheet if you want.

Where this fits in planning

This is a "what-if" tool, not a forecast. It helps to test ideas: what happens to the result as the Inheritance Amount or the Expected Annual Return % changes. The value is in the scenarios you run, not the single answer you get from the defaults.

What this doesn't capture

This is a simplified model that holds its assumptions constant. Real outcomes vary with market conditions, costs, taxes, and timing, so the figure is best read as one scenario rather than a forecast.