Business Cash Cushion: How Much to Set Aside and How to Build It

A business cash cushion is a reserve of funds in a separate account that covers essential expenses when revenue is temporarily lower than usual. The size of the cushion is easy to calculate: monthly essential expenses multiplied by the number of months you want to cover.

Below you will find a calculation using a studio as the example, guidelines for how many months to cover, three ways to build the cushion, and a rule for when to use it. At the end, we show how to track the cushion in your accounting so you can see how much you have already set aside.

In plain terms. Picture a baker who keeps a few days' worth of flour on hand. The supplier might arrive tomorrow or the day after, while the bread comes out every morning on the usual schedule. The stock gives the baker time while the supplier is on the way. A cash cushion works the same way: it gives you time to act calmly.

What a cash cushion is

Let's start with the essentials. A cash cushion is the part of the business's funds set aside in a separate account and meant only for essential expenses during a revenue slump: rent, salaries, taxes and contributions, suppliers. It does not go into daily operations and is not an investment with an expected return.

The cushion solves one problem: it buys you time. If revenue in a given month is lower than usual, you have time to calmly review prices, costs or sales channels. Decisions made with time to think are usually more accurate.

The cushion and growth funds serve different purposes. Growth funds are money you plan to spend: on equipment, advertising, a new employee. The cushion is money you plan to have. That is why they live in different accounts and follow different rules.

How much to set aside: a step-by-step calculation

Take a nail studio run by Olena. All the numbers below are round, so you can easily repeat the calculation with your own data.

Step one: pick the essential expenses. These are costs that occur no matter how many clients came in: rent, salaries, taxes and contributions, utilities, subscriptions, a minimum stock of supplies. Advertising and equipment purchases, which can be paused, are not included. Why: the cushion covers what cannot be put off.

Step two: add up the monthly costs. If some payments occur once a year, such as insurance, divide them by twelve and add the result to the monthly total. This way the cushion also accounts for costs that you do not see in any single month.

Step three: choose the number of months. We cover how to choose in the next section. For the example, Olena picks three months.

Step four: multiply. The result is the cushion target.

Cushion = Monthly essential expenses × Number of months

For the studio: $3,000 × 3 = $9,000. That is the amount that covers three months of essential expenses even if revenue is zero during that time.

How many months to cover

A common guideline is three to six months. It is not a standard. The number depends on how predictable your revenue is and how quickly you can change your costs.

If your answers fall in different columns, you can take the midpoint, for example four months. It is convenient to start with a goal of one month and then increase it. The first target is quickly reachable and already covers small disruptions in incoming payments.

How to check the amount against past months

The three-to-six-month guideline can be supplemented with a check against your own data. To do this, review the past year and find the months when revenue was lower than essential expenses. Even without precise statistics, this check takes a few minutes.

Last year, Olena had three months in a row with revenue of $2,250, $2,000 and $2,500, against essential expenses of $3,000. The gaps were $750, $1,000 and $500, $2,250 in total. The studio had no longer slump, and the amount is smaller than the calculated target of $9,000.

This result does not mean the target is too high. It shows that the first $2,250 of the cushion, which is less than one month of expenses at $3,000, already covers the slump she knows about. The rest of the cushion works as a reserve for a case that has not happened yet: a longer slump or delayed payments from clients.

How to build the cushion

We know the amount; now we need a method you can stick to every month. There are three approaches, and each has its own advantage.

A fixed amount every month

You decide on an amount, for example $750, and transfer it on the first business day after the main payments arrive. The advantage is simplicity and predictability. It is convenient to choose an amount you can set aside even in a slower month, because regularity matters more than the size of the contribution.

A percentage of revenue

Every incoming payment is split, and a set share, for example 10%, is set aside. In a month with revenue of $5,000 that is $500; in a month with revenue of $3,750 it is $375. The advantage: the contribution adjusts to the month by itself. It is convenient to choose the percentage based on your margin: you can only set aside what remains after essential expenses.

A share of peak months

For a seasonal business, it is convenient to set money aside from peak months: a part of the excess over the usual revenue goes straight into the cushion. You can see the usual revenue level from past months, so the excess is easy to determine.

Picture Olena. She runs a nail studio with essential expenses of $3,000 per month. Olena's target is three months, that is $9,000, and the contribution is fixed: $750 every month. After four months the separate account will hold $3,000, which is the first goal, one month of expenses. In January the studio's revenue is $1,750. The $1,250 gap against essential expenses is taken from the cushion, and Olena calmly reviews prices for the spring season.

A simple formula shows how long the build-up will take.

Build-up time (months) = Cushion target ÷ Monthly contribution

For Olena: $9,000 ÷ $750 = 12 months. The table below shows how the cushion grows and how many months of expenses it already covers.

Where to keep the cushion

A cushion needs three qualities: separation, accessibility and the same currency as your expenses.

A separate account. If the cushion sits in the same account as daily operations, it looks like part of the balance and easily goes to current needs. A separate account keeps a boundary between the reserve and operations.

Accessibility. The funds should be available within one or two business days. The purpose of the cushion is to be there when needed. Yield is secondary here.

The same currency. Expenses in dollars are covered in dollars. If part of your expenses is in another currency, it is convenient to hold the corresponding part of the cushion in that currency.

Why not put the cushion into inventory or equipment? Because you need it in the form of cash. Landlords and employees are paid in cash, while selling inventory or equipment takes time and does not guarantee the amount you were counting on.

When to use the cushion and how to replenish it

The cushion is opened in two cases: revenue in a month is lower than essential expenses, or a client's payment date has slipped while your own payment is already due. In other cases, such as new equipment or advertising, a separate growth budget is used.

To know at any moment how much time the amount already set aside gives you, a third formula is useful.

Reserve in months = Cushion balance ÷ Monthly essential expenses

After eight months of saving, Olena has $6,000 in the account. The reserve is $6,000 ÷ $3,000 = 2 months. It is convenient to check this number once a month: it immediately shows how much time you have for decisions, and it takes a minute.

After the cushion is used, it should be replenished. While the cushion is below the target, the monthly contribution returns to the plan in the same amount. This way the reserve is restored without additional decisions.

Advice. It is useful to write down the rule for using it at the start: «the cushion is opened when revenue is lower than essential expenses.» A rule set in advance helps keep the cushion from being spent on everyday purchases.

How to track the cushion in your accounting

When a cushion builds up over months, it is useful to see how much has already been set aside and whether saving is on plan. In separate notes, it is easy to forget to update this number. In accounting, you can do the same thing so that the number is updated along with your entries.

In BizFin, the cushion is kept as a separate account. In the «My Accounts» section, you create a regular account, the same as for a cash register or a bank card, name it, for example, «Cushion,» and choose a color if you like. The monthly contribution is recorded in the «Transactions» section as a «Transfer» from the main account to «Cushion.»

A transfer is neither income nor expense. That is why setting money aside does not change the «Profit and Loss» report or the totals of «Cash Flow by Period» across all accounts: profit stays profit, and the cushion simply moves to a different account. If you save every month, you can turn on «Schedule» in the transfer form and choose the repeat «Monthly.» A reminder will appear in the «Scheduled Transactions» section, and you confirm it with a checkmark, changing the amount or date if needed.

The growth of the cushion is visible in the «Statement» report for that account: the running balance after each contribution shows how much has already been set aside. The total balance at the top of the «My Accounts» page includes all accounts for cash registers and bank cards, so the cushion is counted in it. You calculate the target with the formula above, and the balance of the «Cushion» account shows how close you are to it.

What to remember

• The cushion is calculated from essential expenses. Monthly essential expenses are multiplied by the number of months you want to cover.

• Three to six months is a guideline. The number depends on how stable your revenue is and how quickly you can change your costs.

• Regularity matters more than the size of the contribution. A fixed amount, a percentage of revenue or a share of peak months: choose the method you can follow every month.

• The cushion lives in a separate account. A separate account with access within one or two days preserves the purpose of the funds.

• It is convenient to define the rule for use in advance. The cushion is opened when revenue is lower than essential expenses. Current purchases come out of operating funds.

Frequently asked questions

What is a business cash cushion?

It is a reserve of funds in a separate account that covers essential expenses during a revenue slump. It gives you time to make calm decisions about prices, costs or sales channels.

How many months of expenses should the cushion cover?

A common guideline is three to six months. It is not a standard: for even revenue, something closer to three is enough, while a seasonal business or one that depends on a few clients needs more.

Where do I start if essential expenses are large?

It is convenient to start with a goal of one month of expenses. It is reachable sooner, immediately covers small disruptions in incoming payments, and can then be increased to the chosen number of months.

Where should I keep the cash cushion?

In a separate account that you can access within one or two business days. Separation keeps the cushion from mixing with operating funds, and accessibility lets you use it in time.

Do I need a cushion if I have a credit card or an overdraft?

They are different tools. The cushion consists of your own funds, while borrowed funds are debt with interest. The cushion gives you more freedom, because using it creates no obligations.

Can I use the cushion for growth?

It is better to set aside a separate budget for growth. Then the cushion keeps its purpose, and decisions about growth are made separately from the question of essential expenses.