Money Foundations · 9 min read
The Emergency Fund, Sized for a Physician
Why 'three to six months' is two decisions, not one
Three to six months of what, exactly?
Every residency orientation and every attending finance talk repeats the same rule: keep three to six months of expenses in cash. The rule sounds finished. It is not — it hides two decisions, and getting them wrong is expensive in both directions. A PGY-2 who copies an attending's $50,000 target will spend years of residency feeding a fund she does not need yet, at the cost of space she cannot refill later. An attending earning $300,000 who hears 'six months' and quietly substitutes income for expenses parks $150,000 in cash — roughly $114,000 more than the arithmetic supports — earning savings-account yield while it waits for an emergency that a fraction of it could cover. This module makes both decisions explicit: what counts as an expense, and what moves the multiplier between three months and six. The same rule, applied correctly, produces a different fund for a resident, a dual-income attending household, and a single-income one. By the end, you will have your own number, not a borrowed one.
Essential expenses
The monthly cost of keeping your household running if income stopped: housing, food, utilities, insurance premiums, minimum debt payments, and childcare. Retirement contributions, extra loan principal, travel, and discretionary spending are excluded.
The rule says months of expenses, and the word doing the work is which expenses. Build the base from a real month of statements. Keep what would continue if your income stopped tomorrow: rent or mortgage, groceries, utilities, insurance premiums — including the disability premium you would least want to lapse — minimum payments on every debt, and childcare. Drop what you would pause in a genuine emergency: retirement contributions, extra loan principal, restaurants, travel, and the discretionary line items that make a paycheck pleasant. One caveat on student loans: an income-driven payment may fall substantially after you recertify a lower income, but the timing of that relief has varied in practice — confirm with your servicer, and size the fund on the payment you owe today.
Why it matters: A physician earning $300,000 grosses $25,000 a month, but if the essential column totals $6,000, the fund target is $18,000 to $36,000 — not $75,000 to $150,000. Sizing on income roughly quadruples the cash target and parks six figures at savings-account yield for decades. Sizing on essentials keeps the fund honest: large enough to carry the household, small enough that the rest of your savings can go to work.
The same rule, four answers: $13,500 to $54,000
A PGY-2 with $4,500 in essential monthly expenses, and an attending household earning $300,000 with $9,000 in essential monthly expenses — first with a working spouse, then on one income.
Bottom line: Applied correctly, the same rule spans $13,500 to $54,000 across these households — and never reaches $150,000.
Where the cash lives: insured, boring, and reachable
Placement is a smaller decision than size, and it gets a full module of its own (cash parking) for the fine points. The short version: the fund's job is to be worth full value on your worst day, so it belongs somewhere insured or Treasury-backed, earning a real yield, and reachable within days. A high-yield savings account is the default answer; credit unions carry the same $250,000 insurance limit through NCUA that banks carry through FDIC. Note that even a $54,000 single-income attending fund sits far below that limit at one bank.
| Where it lives | Yield behavior | Access time | Risk |
|---|---|---|---|
| High-yield savings account | Top accounts paid roughly 3.5–4.5% APY as of mid-2026; the rate floats and can drop without notice | Same day to two business days by transfer | FDIC-insured to $250,000 per depositor, per bank, per ownership category |
| Money-market fund | Tracks short-term rates closely; yield moves with the market | One business day after the sale settles, plus transfer time | Not FDIC-insured; the fund seeks a stable share price but does not guarantee it |
| Treasury bills | Locked at purchase for the term; interest is exempt from state income tax | At maturity (4 to 52 weeks), or days if sold early | Backed by the U.S. Treasury; selling before maturity can return slightly less than you paid |
| Checking account | Near zero — the FDIC national average savings rate was 0.38% in mid-2026, and checking typically pays less | Instant | FDIC-insured to the same $250,000 limit; the real risk is inflation shrinking idle cash |
Check yourself: size the hospitalist's fund
This step is a quick self-check. Open the full module to try it with your numbers →
The fund, in five sentences
- Size the fund on months of essential expenses — housing, food, utilities, insurance premiums, minimum debt payments, childcare — never on income.
- The multiplier is a stability judgment: two stable incomes support three months, while a single income, a short contract, or dependents push toward six.
- Keep the fund insured and reachable — a high-yield savings account or similar, under the $250,000 FDIC or NCUA limit — not in your brokerage account.
- Your disability policy's elimination period, commonly 90 days, sets a hard floor: cash must carry the household until the first benefit check actually arrives.
- The fund exists to be spent on true income interruptions and uncovered emergencies, then rebuilt — using it correctly is the point, not a failure.
Do this next: Pull last month's statements tonight, total only the expenses that would continue if your income stopped, and multiply by the number of months your household's income stability supports.
Run this with your own numbers
The interactive version of this lesson works through your actual paycheck, loans, and benchmarks — and your AI advisor can take it from there. Free to start, no card required.
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