The Scenario
Tomas runs a landscaping business that is seasonal, equipment-heavy, and reliant on two big commercial clients. Last summer, a mower failed in June and one client paused for six weeks, creating a double hit he barely survived by leaning on credit cards. His accountant’s advice was blunt: “You need an emergency fund sized for your reality, not a blog post.”
The familiar “three to six months of expenses” rule is a good start, but for businesses it needs more precision.
Who This Guide Is For
This is for business owners who want a cash cushion built on their real numbers: freelancers with lumpy income, seasonal businesses, and owners who have already felt a slow month. If you are starting out with no cushion at all, the same method applies at a smaller scale.
What to Look For
Size your fund on three numbers:
- Fixed monthly costs. Rent, payroll, insurance, subscriptions, and debt payments that continue even with zero revenue.
- Variable costs you cannot avoid. Minimum inventory orders, licenses, and compliance items.
- Revenue seasonality. How much your income swings month to month.
How to Size It
1. Add up your fixed costs. List everything that must be paid in a zero-revenue month. This is your true baseline.
2. Multiply by the right number. Three months of fixed costs is the minimum. Six months fits irregular-income businesses, equipment-heavy operations, and anyone with large clients.
3. Add a small equipment buffer. If one piece of equipment failing would stop your business, add a repair-or-replace allowance on top of the fund.
4. Recalculate quarterly. As rent, payroll, or client concentration changes, your fund target changes with them.
Where to Keep It
Keep the fund in a separate high-yield savings account. It should earn interest, stay FDIC-insured, and be reachable within a day or two. Investing the emergency fund in the stock market risks losing the money exactly when you need it.
Label it clearly so a “good” month does not turn the cushion into a new pickup truck.
How to Fund It Without Feeling It
Building a cushion the size of three months of fixed costs sounds impossible until you break it into deposits.
Start with a floor, not the finish line. One month of fixed costs is a meaningful first milestone. Once that is in place, the business can absorb a single bad week without panic, and the habit is proven.
Fund from every payment, not just leftovers. Transfer a percentage of each client payment or sale into the emergency account the same day it lands. A 5 percent transfer that happens automatically builds the fund while the money is still “new” and easy to miss.
Use windfalls whole. Tax refunds, one-off project fees, and grants should go mostly to the fund until it reaches target. These surprise deposits are exactly how owners who earn modest incomes still build real cushions.
Re-evaluate every quarter. When you recalculate the target, also review whether the funding percentage still fits. As revenue grows, the percentage can shrink while the dollar amount keeps climbing.
The First $1,000 Changes Everything
If the full target feels out of reach, aim for a starter cushion of $1,000 to $2,000 first. That amount covers the typical surprise invoice, a broken tool, or a software renewal that lands in a slow week - the small shocks that otherwise become credit card debt. Once the starter cushion is funded, keep the same transfer habit running toward the full three-to-six-month target.
Signs Your Fund Is Too Small
You will know the cushion is undersized before you can calculate it: a two-week slow period sends you to a credit card, an equipment quote makes you cancel a planned expense, or you skip drawing your own pay to keep the business afloat. Each of those moments is a signal to raise the funding percentage, not to shrug at the season.
What Not to Overpay For
Do not keep the fund in a low-interest checking account if a no-fee high-yield account is available. Do not buy long-term CDs with penalties for early withdrawal.
And avoid funding the emergency account with a business credit card. The whole point is having cash you do not owe anyone.
What to Buy
Marcus by Goldman Sachs and Ally Bank both offer fee-free high-yield savings accounts with solid rates, which makes them natural homes for a business cushion. If you prefer an automated cash strategy alongside your investing, Betterment has cash management options built around goals.
Set the target from your fixed costs, automate the transfers, and give your business the luxury of surviving a bad month without a credit card.