What is EBITDA? A Comprehensive Guide to Understanding Business Profitability Metrics

EBITDA — Earnings Before Interest, Taxes, Depreciation and Amortisation — is one of the most widely used measures of a company’s operating profitability. It strips out financing decisions, tax jurisdiction, and non-cash accounting charges to leave a figure that’s meant to reflect how the underlying business is performing, independent of how it’s capitalised or where it’s domiciled.

For most owner-managed and PE-backed UK businesses, though, the textbook EBITDA definition is only the starting point. The number that actually drives valuation conversations, lender covenants and exit multiples is Adjusted EBITDA — reported EBITDA with a set of normalising adjustments applied. Understanding the difference between the two, and how the adjustments are built and defended, matters far more in practice than the formula itself.

What EBITDA Stands For and Why It Exists

EBITDA rose to prominence in the 1980s during the leveraged buyout boom, when investors needed a consistent way to assess a target company’s ability to service debt and generate cash, independent of its existing capital structure. Because two businesses with identical operating performance can report very different net income depending on how much debt they carry, what tax regime they sit in, and how aggressively they depreciate assets, EBITDA became the standard way to compare them on a level footing.

It’s worth being clear about what EBITDA is not: it is not a measure recognised under UK GAAP (FRS 102) or IFRS. There’s no single standardised definition, which means two companies — or two advisers on the same deal — can legitimately calculate EBITDA differently. That flexibility is exactly why the adjustments applied to get from reported EBITDA to Adjusted EBITDA are so heavily scrutinised in due diligence.

How to Calculate EBITDA

The standard formula is:

EBITDA = Net Income + Interest + Taxes + Depreciation + Amortisation

In practice, most finance teams work from the operating profit line rather than net income, since operating profit already excludes interest and tax:

EBITDA = Operating Profit + Depreciation + Amortisation

Worked example. A business reports net income of £200,000, interest expense of £50,000, tax of £30,000, depreciation of £40,000 and amortisation of £10,000:

EBITDA = £200,000 + £50,000 + £30,000 + £40,000 + £10,000 = £330,000

A larger business reporting net income of £500,000, interest of £100,000, tax of £80,000, depreciation of £60,000 and amortisation of £20,000 would show:

EBITDA = £500,000 + £100,000 + £80,000 + £60,000 + £20,000 = £760,000

EBITDA vs Net Income, EBIT and Operating Profit

Net income is the bottom-line profit after every expense, including interest, tax, depreciation and amortisation. It’s the figure shareholders ultimately care about, but it’s affected by financing and tax decisions that have nothing to do with how well the underlying business is trading.

EBIT (Earnings Before Interest and Tax) sits between the two — it strips out interest and tax but still includes depreciation and amortisation, so it reflects the cost of maintaining and replacing the asset base. For capital-intensive businesses, EBIT is often the more honest measure of operating performance, precisely because EBITDA can mask heavy capital expenditure requirements.

Operating profit is broadly equivalent to EBIT in most UK statutory accounts — profit after operating expenses (including depreciation and amortisation) but before interest and tax.

Why Adjusted EBITDA Is the Number That Actually Matters

In an owner-managed business preparing for sale, or a PE-backed business reporting to its board, the reported EBITDA figure almost never matches what a buyer will actually pay a multiple on. Adjusted EBITDA — sometimes called normalised EBITDA — strips out items that a buyer or lender would reasonably view as non-recurring or non-representative of the business going forward. Common adjustments include:

• Owner remuneration normalisation. Where an owner-director has taken salary or dividends above (or below) what a market-rate manager would cost, the difference is added back or deducted.
• One-off and exceptional costs. Legal disputes, redundancy costs from a specific restructuring, relocation costs, or costs tied to a discrete event rather than ongoing trading.
• Run-rate effects. Where a new contract or price increase only applied for part of the reporting period, an adjustment can annualise its full-year effect.
• Related-party transactions. Above- or below-market rent paid to a connected property company, or supply arrangements with related entities, are typically restated to market terms.

None of these adjustments are automatically legitimate — each one needs to be documented and defensible, ideally with supporting evidence built up over time rather than constructed retrospectively during a live process. A buyer’s due diligence team will test every adjustment line by line, and adjustments that can’t be substantiated get stripped straight back out, taking the multiple down with them.

Limitations and Criticisms of EBITDA

EBITDA has real, well-documented limitations, and it’s worth being upfront about them rather than treating the metric as beyond question:

It excludes capital expenditure. A business can show strong EBITDA while requiring substantial ongoing investment in plant, equipment or technology just to stand still. For capital-intensive sectors, EBITDA alone can flatter the picture significantly.

It ignores working capital movements. A business can be EBITDA-profitable and still run out of cash if receivables, payables or inventory are moving in the wrong direction.

It isn’t standardised. Because there’s no single accepted definition, EBITDA figures aren’t always comparable between companies without checking exactly what’s been added back.

Debt and tax are real costs. A highly leveraged business with a large interest bill can look far healthier on an EBITDA basis than its actual cash position supports.

For these reasons, most experienced investors and lenders use EBITDA alongside — never instead of — free cash flow, working capital trends and a proper quality-of-earnings review.

EBITDA in Valuation and M&A

EBITDA (and Adjusted EBITDA specifically) is the base most private company valuations are built on in the UK mid-market, expressed as an EV/EBITDA multiple. The multiple itself is driven by sector, growth rate, customer concentration, margin quality and size — but the EBITDA figure it’s applied to is very often the single biggest point of negotiation in the deal, because even a modest shift in the adjusted number moves the headline valuation by a multiple of that amount.

This is why the quality of a business’s EBITDA — how defensible the adjustments are, how consistent the margin trend looks, how concentrated revenue is in a small number of customers — tends to matter more to buyers than the absolute size of the number. A well-documented, defensible Adjusted EBITDA supported by good management information will consistently outperform a larger but poorly substantiated figure once due diligence starts.

How FD Capital Can Help

FD Capital places fractional and interim CFOs and Finance Directors into UK businesses preparing for investment, exit or ongoing PE reporting, and building a defensible Adjusted EBITDA position is one of the most common briefs we work on. If you’re preparing a business for sale or investment and want the EBITDA bridge built properly before diligence starts — rather than under pressure during it — our team can help you prepare.

References

• ICAEW — Guidance on Non-GAAP Performance Measures
• British Private Equity & Venture Capital Association (BVCA) — Research and Guidance

This article is provided for general information purposes and does not constitute financial or professional advice. FD Capital Recruitment Ltd is registered at Companies House (no. 13329383) and is operated by an ICAEW-registered practice.

Adrian Lawrence

Adrian Lawrence FCA is the founder of FD Capital and a Fellow of the Institute of Chartered Accountants in England and Wales (ICAEW). He holds a BSc from Queen Mary College, University of London, and has over 25 years of experience as a Chartered Accountant and finance leader working with private, PE-backed and owner-managed businesses across the UK. He founded FD Capital to connect growing businesses with the Finance Directors and CFOs they need to scale — and personally interviews candidates for senior finance appointments.