How do you calculate terminal value?

Here is a fact that surprises most people learning valuation: in a typical DCF, the terminal value is usually 60 to 80 percent of the total answer.

Think about what that means. You carefully forecast five years of cash flows, line by line. And most of the value comes from a single number covering everything after that.

That is exactly why interviewers push hardest here. The detailed forecast is where you show your work. The terminal value is where the answer actually comes from.

Why terminal value exists

A DCF says a business is worth all the cash it will ever produce, converted into today's money.

The problem is the word "ever". Businesses do not stop after five years. But nobody can sensibly forecast year thirty-eight.

So you split the future in two.

The forecast period. Five or ten years, projected in detail, year by year.

Everything after that. Captured in one number: the terminal value.

The terminal value sits at the end of your final forecast year and represents the whole rest of the company's life from that point onward.

Method 1: Perpetuity growth

This method assumes the business keeps going forever, growing slowly and steadily.

Terminal value = final year cash flow × (1 + g) ÷ (WACC − g)

Where g is the growth rate you expect forever after.

Why the growth rate must be small

This is the part people get wrong, and it is worth understanding rather than memorising.

If a business grew at 8 percent forever, and the economy grew at 2 percent, then given enough time that one business would become larger than the entire economy. Which is impossible.

So the long-term growth rate has to be modest. In practice people use 1 to 3 percent — roughly in line with inflation or long-run economic growth.

Anything above 3 percent needs a strong reason. Above 5 percent is very hard to defend.

Why growth must be below WACC

Look at the bottom of the formula: WACC minus g.

If WACC is 9 percent and growth is 2 percent, the bottom is 7 percent. Fine.

If growth creeps up to 8 percent, the bottom becomes 1 percent — and dividing by a tiny number produces an enormous result.

If growth equalled or exceeded WACC, the maths breaks entirely. The value becomes infinite or negative.

So if your model ever spits out a ridiculous number, check this first. It is almost always the cause.

Method 2: Exit multiple

This method takes a different view. Instead of assuming the business runs forever, it assumes you sell it at the end of the forecast.

Terminal value = final year EBITDA × exit multiple

The multiple comes from what similar companies trade at today, or from what buyers have recently paid.

So if comparable businesses trade at 8 times EBITDA, and your company makes $50 million of EBITDA in the final forecast year, the terminal value is $400 million.

This is more common in investment banking, for two reasons. It is grounded in real observable market data. And it is easier to defend in a client meeting, because you can point at actual companies.

Discounting it back

Here is the step people forget under pressure.

The terminal value sits at the end of your final forecast year. It is a future amount. So like every other future amount in a DCF, it has to be brought back to today's money.

You discount it at the same WACC, over the same number of years as your final forecast year.

If you forget this, your valuation comes out dramatically too high. It is one of the most common errors in interviews.

Cross-checking the two methods

This is the thing almost nobody does, and it is one of the easiest ways to stand out.

The two methods should roughly agree. If they do not, one of your assumptions is off. So you check each against the other.

Check 1: what growth does your exit multiple imply?

Take your exit multiple, work backwards through the perpetuity formula, and see what growth rate it corresponds to. If it implies 7 percent growth forever, your multiple is too high.

Check 2: what multiple does your growth rate imply?

Do the reverse. If your 2 percent growth rate implies a 22 times EBITDA multiple for a mature industrial business, something is wrong.

Mentioning either of these unprompted signals that you have actually built a model rather than read about one.

The terminal year has to be normal

One more thing that gets tested.

Whatever happens in your final forecast year gets repeated forever, or gets multiplied by an exit multiple. So that year has to look like a normal, steady-state year.

That means:

• Capital spending roughly equal to depreciation. The company is maintaining its assets, not expanding aggressively.
• Stable profit margins, not an unusually good or bad year.
• Working capital growing in line with revenue.

If your final year happens to include a huge one-off factory build, you cannot repeat that forever. You would be assuming the company builds a factory every year until the end of time.

Expect a follow-up like: "your final year has capex at twice depreciation — is that a problem?" It is.

Saying it out loud

"There are two ways to calculate terminal value.

The perpetuity growth method takes the final year's cash flow, grows it at a small rate — usually 1 to 3 percent — and divides by WACC minus that growth rate. The growth rate has to be low, because no business can outgrow the economy forever, and it has to be below WACC or the formula breaks.

The exit multiple method takes the final year's EBITDA and applies a multiple based on what comparable companies trade at. This is more common in banking because it uses real market data.

Either way, you discount the terminal value back to today at the same WACC.

And I would cross-check them — back out the implied growth rate from the exit multiple, and the implied multiple from the growth rate, to make sure both are sensible. Terminal value is usually most of the total, so it is worth checking twice."

What the interviewer is really checking

Do you know how much rides on this?

Volunteering that terminal value is typically 60 to 80 percent of total value tells the interviewer you have seen a real output page. It also naturally opens the sensitivity conversation they were heading toward anyway.

Do you understand the maths limit?

Growth has to be below WACC. As they get close, the value explodes. Candidates who do not see why tend to pick growth rates that produce absurd answers.

Do you cross-check?

Very few candidates offer the implied-growth and implied-multiple checks without prompting. It is one of the most reliable ways to look experienced.

Is your terminal year normal?

Expect a probe about a final year with unusual capex or margins. The right answer is that you would normalise it first.

Do you remember to discount?

Simple, and forgotten under pressure more often than you would expect.

Common mistakes

A growth rate that is too high.

Above 3 percent in a developed market needs justification. Above 5 percent is close to indefensible.

Setting growth close to or above WACC.

The formula divides by WACC minus growth. Squeeze that gap and the number explodes. If your model produces something wild, this is nearly always why.

Forgetting to discount the terminal value.

It sits at the end of your forecast. It has to come back to today like everything else. Forgetting inflates your answer badly.

Applying the exit multiple to the wrong year.

It goes on the final forecast year's EBITDA, not today's.

Using the entry multiple as the exit multiple with no comment.

Sometimes reasonable, but it assumes the business will be valued the same way years from now. Say that you are assuming it, rather than doing it silently.

Confusing terminal value with enterprise value.

Terminal value is one component. Enterprise value is the discounted forecast cash flows plus the discounted terminal value.

Only offering one method.

Even if you would use an exit multiple in practice, name both and explain why you chose one.