Net Debt Edge Cases: How to Handle Pensions, Leases, and NOLs in the EV Bridge

You know the basic bridge cold: Enterprise Value = Equity Value + Debt + Preferred Stock + Noncontrolling Interest − Cash. Then an interviewer asks, "What do you do with an unfunded pension?" and the room goes quiet.

Pensions, leases, and net operating losses (NOLs) are the three edge cases that come up most in technical interviews and on live deals. They test whether you understand why items sit in the bridge, not just which items do.

This post gives you one principle that handles all three, plus worked numbers and the answers interviewers want to hear.

The One Principle Behind Every Edge Case

Before getting into specifics, lock in this idea:

Anything that is a claim on the company's cash, and isn't already captured in the metric you're valuing, belongs in the bridge.

That breaks down into two questions you should ask about any item:

• Is it debt-like (or cash-like)? Does it represent money owed to someone other than common shareholders, or a resource that will save the company cash?
• Is it already in the numbers? If the cost or benefit already flows through EBITDA or your projected cash flows, adding it to the bridge double counts it.

Keep these two questions in your head. Every edge case below is just an application of them.

Pensions: The Debt You Don't Borrow From a Bank

Why an unfunded pension is debt-like

A defined benefit pension plan promises employees future payments. The company sets aside plan assets to cover a projected benefit obligation (PBO).

When the PBO exceeds plan assets, the plan is underfunded. That gap is money the company owes, just like a loan. It will eventually have to contribute cash to close it, and that cash won't go to shareholders.

So an unfunded pension deficit gets added to net debt.

The worked numbers

Say a company reports:

• PBO: $900 million
• Fair value of plan assets: $700 million
• Tax rate: 25%

The deficit is $900m − $700m = $200 million.

Many practitioners tax-effect the deficit because pension contributions are generally tax-deductible. Each dollar the company contributes costs it less than a dollar after tax:

$200m × (1 − 25%) = $150 million added to net debt

Practice varies here. Some banks add the full pre-tax deficit, others use the after-tax figure. In an interview, mentioning that you'd consider tax-effecting it (and why) is what earns you points.

Why this isn't double counting

Here's the consistency check. Under US GAAP, pension expense is split:

• Service cost (benefits earned by employees this year) sits in operating expenses, so it reduces EBITDA. That's an ongoing operating cost, and it stays there.
• Other components (like interest cost on the obligation and expected return on assets) are presented outside operating income.

The deficit represents past promises that haven't been funded yet. It's a financing-type obligation separate from the ongoing service cost in EBITDA, so adding it to the bridge doesn't double count.

What about a pension surplus?

If plan assets exceed the PBO, you might be tempted to treat the surplus as cash. Be careful. The company usually can't freely access that money, and pulling it out can trigger significant taxes and restrictions.

The safe answer: a surplus is sometimes treated as cash-like, but typically with a meaningful haircut, if it's counted at all.

Leases: The Edge Case Where Accounting Rules Change the Answer

Leases are the trickiest of the three because the right treatment depends on the accounting standard and on how EBITDA is defined. This is where the "is it already in the numbers?" question does all the work.

IFRS 16: include lease liabilities

Under IFRS 16, nearly all leases go on the balance sheet as a lease liability. The income statement no longer shows rent expense. Instead you see:

• Depreciation of the right-of-use asset (below EBITDA)
• Interest on the lease liability (below EBITDA)

Since the lease cost has been pulled out of EBITDA, the obligation must show up somewhere else. That somewhere is net debt. Under IFRS 16, include lease liabilities in net debt.

US GAAP (ASC 842): it depends on the lease type

ASC 842 also puts operating leases on the balance sheet, but the income statement treatment is different:

• Operating leases: a single straight-line lease cost stays in operating expenses, so it still reduces EBITDA. Adding the operating lease liability to net debt would count the lease twice. Typically exclude it.
• Finance leases: split into depreciation and interest, like IFRS 16. Include them in debt.

The worked numbers: what happens if you get it wrong

Take a retailer reporting under IFRS 16:

• EBITDA (post-IFRS 16, so rent is excluded): $250 million
• Financial net debt (bank loans minus cash): $500 million
• Lease liabilities: $400 million
• Peer EV/EBITDA multiple (also calculated on a post-IFRS 16 basis): 8.0x

Implied enterprise value: $250m × 8.0 = $2,000 million

Correct bridge: $2,000m − $500m − $400m = $1,100 million equity value

Forgetting the leases: $2,000m − $500m = $1,500 million equity value

That mistake overstates equity value by $400 million, about 36%. On a pitch, that's not a rounding error. That's a blown valuation.

The golden rule for leases

The numerator and the denominator must match. If your EBITDA excludes lease costs, your EV must include lease liabilities. And your peer multiples must be calculated the same way.

A post-IFRS 16 multiple applied to pre-IFRS 16 EBITDA (or vice versa) gives you garbage, even if each number is individually correct.

NOLs: The Cash-Like Asset Hiding in the Tax Footnote

Why NOLs have value

A net operating loss is a past tax loss the company can use to reduce future taxable income. Lower taxable income means lower cash taxes, which is real value to an owner.

Because NOLs save cash, they behave like a cash-like asset. If they aren't captured elsewhere, you can account for them by adding their value in the bridge (effectively subtracting from net debt, which increases equity value).

Value the tax savings, not the face amount

This is the most common mistake. A $100 million NOL is not worth $100 million. It's worth the present value of the taxes it saves.

Say a US company has:

• NOL balance: $100 million
• Tax rate: 21%
• Expected usage: $25 million per year for 4 years
• Discount rate: 10%

Annual tax savings: $25m × 21% = $5.25 million

Present value over 4 years: $5.25m × 3.170 (the 4-year annuity factor at 10%) ≈ $16.6 million

So the NOL is worth roughly $16.6 million in your valuation, not $100 million and not even the undiscounted $21 million.

Don't double count in a DCF

If your DCF already projects lower cash taxes because the company uses its NOLs, the value is already in your free cash flows. Adding it again in the bridge counts it twice.

Pick one method:

• Model NOL usage in the projected cash taxes, or
• Value the NOLs separately and add them in the bridge

Never both.

Two real-world limits to know

US NOLs come with rules that cap their value, and interviewers love when you mention them:

• 80% limitation: for federal NOLs arising in tax years beginning after 2017, the deduction is generally limited to 80% of taxable income in a given year, though these NOLs can be carried forward indefinitely.
• Section 382: after an "ownership change" (broadly, more than a 50 percentage point shift in ownership by major shareholders over a three-year period, which an acquisition typically triggers), the annual NOL usage is limited. The cap is roughly the loss company's equity value times the IRS long-term tax-exempt rate.

The practical takeaway: in an M&A context, an acquirer often can't use the target's NOLs as fast as the target could have. That reduces their present value.

Quick Reference: How to Treat Each Item

How to Answer These in an Interview

When you get an edge case question, don't just state the answer. Walk through the logic in three beats:

1. Classify it: "An unfunded pension is a claim on future cash owed to employees, so it's debt-like."
2. Check consistency: "The service cost is already in EBITDA, but the deficit represents unfunded past obligations, so adding it doesn't double count."
3. Add the nuance: "I'd probably tax-effect it, since contributions are generally tax-deductible."

Here's a strong answer to "How do you treat leases in enterprise value?":

"It depends on whether lease costs are in EBITDA. Under IFRS 16, they're replaced by depreciation and interest, so lease liabilities belong in net debt. Under US GAAP, operating lease cost still hits EBITDA, so I'd usually leave operating lease liabilities out to avoid double counting. Either way, the multiple and the EBITDA have to be on the same basis."

That answer shows you understand the principle, not just the rule. And that's exactly what separates candidates who memorized a guide from candidates who can actually build a valuation.

The Bottom Line

You don't need to memorize a separate rule for every strange line item. Ask two questions every time: Is this a claim on (or source of) cash? and Is it already in my numbers?

Pensions, leases, and NOLs are just three tests of that same logic. Nail them, and you'll handle whatever edge case an interviewer throws at you next.