Measuring charity effectiveness: beyond the overhead ratio

Here is the most underappreciated fact in philanthropy: charities don't differ in effectiveness by 20 or 30 percent — they differ by factors of ten, a hundred, sometimes a thousand. Two equally honest, equally hardworking organizations can convert the same $1,000 into wildly different amounts of good, mostly because of what problem they work on and which intervention they use. For a donor, that means the choice of where to give routinely matters more than how much to give — and almost nobody spends their attention that way.

Why overhead tells you almost nothing

The instinct to judge charities by overhead percentage — how much goes to salaries and fundraising versus 'the cause' — measures the wrong thing. Overhead tells you how money was spent, not what it accomplished. A charity spending 10% on overhead delivering an intervention that doesn't work converts your dollars into well-administered nothing; one spending 30% on overhead — funding skilled staff, monitoring, and evaluation — while delivering a proven intervention can do orders of magnitude more good. Use extreme overhead as a fraud screen (fundraising firms eating half the budget is disqualifying), then drop the ratio entirely and ask the only question that matters: what does a dollar here actually cause to happen?

Cost-per-outcome: the donor's power tool

• The unit of analysis is an outcome, not an activity: not 'we distributed 10,000 nets' but 'cases of malaria averted per $1,000' — and ultimately, lives saved or dramatically improved per dollar.
• Evaluators like GiveWell publish exactly this: their top global-health charities (malaria prevention, vitamin A supplementation, direct cash transfers) are estimated to save a life for roughly $3,000–5,500 — numbers based on randomized trials and audited delivery data.
• The same logic works domestically at smaller magnitudes: cost per student brought to reading level, per family stably housed, per job placement retained a year. Good organizations increasingly publish these; great ones publish their failures too.
• Comparisons only work within a cause: cost-per-outcome can rank two malaria charities, but ranking malaria against the local food bank against the arts is a values question data can inform but not settle.

The three questions that predict impact

1. Is the problem big and neglected? Impact concentrates where need is vast and funding is thin — the tenth funder of a neglected problem buys more change than the ten-thousandth funder of a famous one.
2. Does the intervention actually work? Look for randomized trials or strong quasi-experimental evidence, not testimonials. Many intuitive programs (scared-straight programs are the classic case) fail rigorous testing or cause harm.
3. Can this organization absorb more money productively? 'Room for more funding' is real: a great program that's fully funded turns your marginal dollar into reserves, not outcomes. Evaluators assess this explicitly.

A practical structure for a normal donor

You don't need a research staff; the research is free. A workable portfolio: direct a meaningful slice — many effectiveness-minded donors use half — to top-rated high-impact charities via GiveWell or similar evaluators, where the evidence is strongest and your marginal dollar goes furthest. Keep a slice for your community, chosen with the three questions above and a look at the organization's own outcome reporting. Keep a slice for causes you love beyond any metric — the church, the arts, the alma mater — labeled honestly as loyalty and love, which need no apology. What changes isn't that you stop giving locally or personally; it's that some real portion of your giving is deliberately pointed at the highest-leverage uses on earth, on purpose.

What $1,000 buys, by destination

The bottom line

Effectiveness varies between charities by multiples that dwarf anything overhead ratios can detect, and cause selection is where most of the leverage lives. Retire the overhead obsession, ask what a dollar causes to happen, borrow the free research of professional evaluators, and split your giving deliberately between maximum impact and personal meaning. The generosity is yours either way — the difference is whether a hundred-fold multiplier is working for you or sitting unused.