Free Excel tool · endowment finance
A Monte Carlo stress test for your spending policy. Run a thousand twenty-year scenarios and see the odds your draw quietly erodes the corpus — before the board votes on next year's rate.
Thanks — it's ready below. Drop it into your next finance-committee packet and run your own assumptions.
Download the tool (.xlsx)Illustrative simulation · 6.2% real return, 11% volatility, 4.5% draw, 20 years
What it shows your board
The share of scenarios where real corpus falls below the original gift — the number behind your ASU 2016-14 disclosures.
How often the fund runs dry inside your horizon, given the return and volatility assumptions you set.
The full range of outcomes, 10th to 90th percentile, year by year — the picture a finance committee actually understands.
No add-ins, no scripts to enable, no learning curve. Open it, type in your endowment's value and your spending rate, and read the odds. Everything recalculates the moment you change an assumption.