Why Do You Subtract Cash From Enterprise Value?

This is one of the most confusing aspects of the enterprise value build for people starting out in prep. There are a lot of explanations for this. The correct theoretical one is that enterprise value is the value of the operating business. Cash isn't part of that business, so it comes out.

The intuition behind it is simple: equity holders already own the cash, so the market cap you started from already includes it. Subtracting cash takes it back out, and what's left is the business itself. In practice you subtract cash that is both excess and available, and restricted cash is usually neither.

Three companies, one business

Take three companies running the same operating business. Same products, same customers, same $100m of EBITDA and the same $20m of D&A. The only thing that differs is the balance sheet. Assume cash earns 4%, debt costs 8%, and the tax rate is 25%.

All three own the same business, and the market prices that business at $800m in every case. Company B's equity is worth $200m more than Company A's for one reason: B's shareholders also own $200m of cash. Company C's equity is worth less than A's because C's shareholders owe $300m that gets paid before they see anything.

Now read the last two rows. EV / EBITDA is 8.0x for all three, which is right, because all three own the same business. P / E gives 13.3x, 15.2x and 14.6x for businesses that are identical.

Notice that the P / E figures don't even move in an intuitive direction. Company C carries the most debt and doesn't screen cheapest. The cash and the debt are doing all the work, and neither tells you anything about how the business operates.

Equity holders own the cash

Market capitalization is the market's price for what shareholders own. That includes the operating business and the cash in the bank.

Suppose Company B pays out its entire $200m cash balance as a special dividend. The cash leaves, and the share price falls by roughly the amount paid¹. Nothing happened to the business. The market cap fell because shareholders no longer own the cash. Enterprise value didn't move at all: B just turned into A.

That's the cleanest way to see why cash comes out. You're not destroying value, and you're not assuming the buyer gets a discount. You're removing something the share price already paid for, so that what remains is the operating business on its own.

The acquirer's version of the same point

There's a second route to the same answer. Buy Company B for its $1,000m equity value and the $200m sitting in its accounts comes with it. You can pay yourself back the next day. Your real outlay for the business is $800m.

Most private M&A formalizes this. Deals are usually done cash-free, debt-free: at close the seller keeps the cash and the debt is repaid out of the proceeds.

The consistency rule

A third argument matters because it generalizes past cash. A multiple only works when the numerator and the denominator belong to the same claimholders.

EBITDA is calculated before interest, so it belongs to everyone who funded the business: lenders and shareholders both. Enterprise value is the value of the claims those same people hold. The two sides match, which is why EV / EBITDA is the same 8.0x across all three companies.

P / E also matches: price is what shareholders own, and net income is what's left for shareholders after lenders are paid. It's a valid multiple. But it's a multiple of the equity, and the equity's earnings depend on how the business is financed. You can see where that happens in the table: interest income and interest expense sit below EBITDA and above net income. Change the cash or the debt and net income changes, even though nothing about the business did.

So the rule isn't that P / E is wrong. It's that P / E answers a different question. Use it to compare companies financed the same way. Use EV / EBITDA when you want the operating business on its own, which is exactly why cash has to come out of the numerator.

Do you subtract all of it?

On a screen, yes. In work you're actually underwriting, no.

Total cash is the convention for comparable companies analysis, and the reason is consistency rather than precision. Estimating minimum operating cash company by company across fifteen comps introduces more error through inconsistent judgment than it removes.

For a single company the answer changes. A business needs a minimum cash balance to make payroll and absorb working capital swings. That cash is as operational as inventory, and it should stay in. Only the excess comes out.

There's no standard definition of excess cash². In a deal this is part of the negotiation: you have to decide what minimum cash is.

What about restricted cash?

Restricted cash is cash the company isn't free to spend. The usual sources:

• Collateral posted against letters of credit
• Escrow from a prior acquisition or disposal
• Debt service reserve accounts required by a credit agreement
• Self-insurance and workers' compensation reserves
• Customer deposits held in trust

The rule is that restricted cash generally stays in, i.e., you don't subtract it. There are two reasons.

First, it isn't available. Equity holders can't access it, and it isn't excess by any definition.

Second, subtracting it usually double counts. Restricted cash almost always secures an obligation. Letter of credit collateral backs a letter of credit. A debt service reserve account backs the debt. If you're already counting that obligation in your debt figure and you also subtract the cash securing it, you've netted the same item twice and understated enterprise value.

Trapped foreign cash is a different problem

Cash held at foreign subsidiaries isn't legally restricted, but bringing it home can carry a tax cost. The convention is to haircut it rather than exclude it, subtracting it at an after-tax value. Since the 2017 tax act that cost is lower than it used to be, though withholding and local rules mean it isn't zero.

What this does to the number

Go back to Company C: $700m of equity, $300m of debt and $200m of cash. Say $40m of that cash is restricted and the business needs about $60m to operate.

The same company can have three answers and a multiple that moves from 8.0x to 9.0x. So “subtract cash” isn't a complete instruction.

Answering it in an interview

The fifteen-second version: enterprise value is the value of the operating business, shareholders already own the cash through the market cap, so it comes out.

If they ask how much: excess and available cash, not the whole balance. If they ask about restricted cash: it usually stays in, and the reason is the double count.

Three answers to avoid, because most people searching this question have absorbed at least one of them:

• “Because cash reduces net debt.” This restates the formula instead of explaining it.
• “Because the buyer uses the cash to pay down the purchase price.” True, but it's the mechanism rather than the reason.
• Subtracting restricted cash because it showed up on the cash line.

Takeaways

Cash comes out because enterprise value prices the operating business, and shareholders already own the cash inside the market cap. The consistency test is worth memorizing, because it's generalizable: the numerator and the denominator have to belong to the same claimholders. Subtract cash that is excess and available. Restricted cash is usually neither, and netting it against a liability you've already counted is the most common way to get this wrong.