How much cash should an ophthalmology resident keep?
By Ryan Inman
Published · Updated
The short answer
One month of expenses first, then three, priced at the resident lifestyle you actually live. The reserve is sized to the month it has to protect, not to the attending income you expect later, and building it is step two of the resident waterfall, right behind the employer match and ahead of the credit cards, the coverage purchases beyond disability, and every investment account.
A resident month is a knowable number: rent, food, transport, insurance, the loan's income driven minimum, and the small recurring lines, added once and honestly. One month of that number, held in plain cash, is what keeps the first emergency, a car repair, a flight home, a board exam fee landing at the wrong moment, from going onto a card at card rates and undoing the order of everything else.
Part of the ophthalmology hub.
Why one month first, and why it is not three
The ladder exists because a resident paycheck cannot fund everything at once, and the order of funding is where households win or lose the training years. One month of reserve converts the most common emergencies from debt events into cash events. The second and third months protect against rarer and larger events, an income interruption, a program change, a family emergency with travel attached, and they are worth having, and they wait their turn behind the cards reaching zero and the disability policy being placed, because a resident carrying card balances at high rates while building a third month of cash is paying a spread for a feeling of safety the arithmetic does not support. The waterfall states the order plainly: one month, cards to zero, coverage, then two more months on the way to three, and the reserve is finished at attending scale later, six months on W2 income and up to twelve on contractor income, at step ten of the attending waterfall.
Trainee life adds two ophthalmology specific wrinkles. The first is the internship year move: training starts with a relocation, often to a different city from the residency years, and moving costs land before the first paycheck does. A resident entering training with any savings at all should treat the first reserve month as partly pre spent on that move and rebuild it in the first months of the internship year. The second is the fellowship decision at the end of residency, which can mean another move and another gap. The three month target by the end of residency is sized with that move in mind.
What counts as cash, and what does not
Cash means money that is there on the worst day, in a savings account, uninvested, reachable in days. It does not mean the Roth IRA, whose contributions can technically be withdrawn and whose whole purpose is to never be touched. A reserve that lives inside the retirement account is a reserve that gets spent and a retirement account that gets raided, both failures at once. It does not mean a credit line, which is a lender's promise that can shrink exactly when income wobbles. It does not mean the expected tax refund or the anticipated moonlighting check. And it does not mean a brokerage account invested in anything, because the emergency and the market drawdown that makes selling painful are correlated in every household's lived experience. Plain, boring, uninvested cash is the entire design, and its low return is the premium paid for the protection, correctly understood as an insurance cost rather than an investment failure.
The main points
- One month of expenses at the resident lifestyle first, then three, in the waterfall's order: match, reserve month, cards to zero, coverage, then months two and three.
- The reserve is priced on the month it protects, and it is rebuilt at attending scale later, six months on W2 income and up to twelve on contractor income.
- Cash means uninvested and reachable. The Roth, a credit line, and an invested account are none of them a reserve.
- Two trainee moves, into the internship year and possibly into fellowship, are what the three month target is really sized for.
Related questions
Does a working spouse change the target?
It changes the risk, and the months follow the risk. A household with two incomes, where either salary covers the month's core expenses, can run the ladder as written with confidence at the lower end. A household where the resident income is the only income, or where a spouse is in school, should reach three months faster and treat the attending reserve target as six months without debate. The months are counted on the household's combined spending, including every obligation the resident income would carry alone in a bad month. The ladder's months are household numbers, priced on household spending, never on the resident salary alone.
Should the reserve come before the disability policy?
One month of it, yes. The full three, no. The order in the waterfall is deliberate: the first month, then the cards, then coverage. The disability policy is bought in training because its price depends on a health record that only moves one direction, and a resident who spends a year building months two and three before placing the policy has insured the car repair and left the career uninsured.
Where does moonlighting money go in this order?
Into the ladder, at whatever step the household currently stands. Moonlighting income tempts residents to skip ahead to investing, because it feels like extra money. It is income like any other, and the waterfall does not ask where a dollar came from. Reserve first, cards, coverage, then the Roth space the moonlighting often makes reachable for the first time.
Sources
- Financial Fellowship, the 3 bucket framework. The reserve as bucket one, the Safety Net, finished before the first taxable dollar. Accessed October 2026.
- Financial Fellowship, the protection stack framework. The coverage step the reserve ladder wraps around. Accessed October 2026.