MPEEM vs With-and-Without Method
Comparing MPEEM and the With-and-Without method for valuing intangible assets. When to isolate excess earnings versus model the absence of an asset.
Introduction
The Multi-Period Excess Earnings Method (MPEEM) and the With-and-Without Method are two of the most sophisticated income-approach techniques used in purchase price allocation. Both are designed to isolate the value of a specific intangible asset from the broader business, but they approach the isolation problem from opposite directions.
MPEEM works from the inside out — it starts with total business cash flows and strips away the returns attributable to every other asset until only the "excess earnings" from the target intangible remain. The With-and-Without Method works from the outside in — it models two complete business scenarios (one with the asset, one without) and values the asset as the difference in enterprise value between them.
The choice between these methods depends on the nature of the asset, how deeply it is embedded in the business, and whether its value is best understood through its earnings contribution or through the impact of its hypothetical absence.
How MPEEM Works
MPEEM isolates the earnings attributable to the primary intangible asset by deducting required returns on all other contributing assets. The methodology involves:
- Project total business cash flows for the relevant business unit
- Identify every contributory asset — tangible assets, working capital, workforce, other intangible assets
- Estimate each contributory asset's required return (the "contributory asset charge" or CAC)
- Deduct all CACs from total cash flows to derive excess earnings
- Discount the excess earnings to present value using an asset-specific discount rate
- Apply tax amortisation benefit where applicable
The method is elegant in concept but demanding in execution. Every supporting asset must be identified, valued, and assigned a fair return. If the assembled workforce contributes to earnings, it needs a CAC. If existing technology supports revenue, it needs a CAC. The sum of all CACs and the residual must reconcile to total business cash flows.
MPEEM should only be applied to one asset per reporting unit — the primary income-generating intangible. Applying it to multiple assets creates circular dependencies where each asset's value depends on the others' CACs.
How the With-and-Without Method Works
The With-and-Without Method (W&W) values an intangible by modelling two hypothetical scenarios:
With scenario: The business operates normally with the asset in place. Enterprise value is calculated under standard assumptions.
Without scenario: The business operates as if the asset never existed (or was suddenly removed). The model projects how revenue, costs, growth, and profitability would differ. Enterprise value is calculated under these diminished assumptions.
The asset's value equals the difference between the two enterprise values.
Modelling the "without" scenario
The critical challenge is constructing a credible "without" scenario. Key considerations:
- Revenue impact: Would revenue drop immediately, gradually, or not at all?
- Cost to recreate: Would the business attempt to rebuild the asset? What would that cost?
- Time to recover: How long before the business returns to its "with" trajectory?
- Customer attrition: For relationship-dependent assets, what is the attrition curve?
| Parameter | With Scenario | Without Scenario |
|---|---|---|
| Year 1 revenue | £50 million | £35 million (-30%) |
| Revenue growth rate | 8% p.a. | 3% p.a. (rebuilding) |
| Time to recovery | N/A | 4-5 years |
| Additional costs | None | £2 million/year rebuild |
| Enterprise value | £120 million | £78 million |
| Asset value | £42 million |
The With-and-Without Method requires the most judgement of any intangible valuation approach. The "without" scenario is inherently speculative — it asks practitioners to model a counterfactual world. This subjectivity can be both a strength (it captures holistic business impact) and a weakness (it is harder to audit).
Side-by-Side Comparison
Methodology comparison
| Criterion | MPEEM | With-and-Without |
|---|---|---|
| Approach | Bottom-up: isolate excess earnings | Top-down: measure total business impact |
| Best suited for | Customer relationships, primary income assets | Non-competes, licences, workforce-dependent assets |
| Complexity | High — requires CACs for all assets | Very high — requires full counterfactual modelling |
| Key assumption risk | Contributory asset charge rates | "Without" scenario projections |
| AICPA guidance | Recommended for primary intangible | Used when asset has binary business impact |
| Number of assets | One per reporting unit | One per application |
| Audit challenge | Defending CAC rates and methodology | Defending the "without" scenario credibility |
When each method is most defensible
MPEEM Is Strongest When
- Asset is the primary income-generating intangible
- Contributory assets can be clearly identified
- Required returns on contributory assets are estimable
- Customer relationships in a standard PPA
- AICPA Practice Aid methodology is expected
W&W Is Strongest When
- Asset has binary impact — business model fails without it
- Non-compete agreements tied to key individuals
- Regulatory licences essential to operating
- Value is best understood through absence impact
- Traditional CAC model is not feasible
Practical Example: Valuing a Non-Compete Agreement
A technology company acquires a competitor. The founder of the acquired company signs a three-year non-compete agreement. How should this be valued?
MPEEM would struggle here. The non-compete does not directly generate earnings — it protects existing earnings from competitive erosion. There are no "excess earnings" attributable to a non-compete in the traditional sense.
With-and-Without is the natural fit:
- With scenario: Business retains all customers and grows at projected 12% p.a.
- Without scenario: The founder starts a competing firm. Customer attrition increases by 15% in year one, 10% in year two. Revenue growth drops to 3%. Additional competitive spending of £1.5 million/year required.
- Difference in enterprise value: £8.2 million — this is the fair value of the non-compete.
Non-compete agreements are the textbook application of With-and-Without. The asset's value is entirely defined by what happens in its absence — making the counterfactual modelling approach the most logical and defensible method.
Practical Example: Valuing Customer Relationships via MPEEM
Now consider the customer relationships from the same acquisition. The acquired company has 200 enterprise customers generating £30 million in recurring revenue.
With-and-Without would be cumbersome. Modelling the entire business without any customers is essentially modelling a startup — the "without" scenario becomes unrealistic.
MPEEM is the standard approach:
- Total business cash flows: £30 million revenue, £9 million operating cash flow
- Contributory asset charges: £1.2 million (technology CAC) + £0.8 million (workforce CAC) + £0.4 million (working capital CAC) + £0.3 million (fixed assets CAC)
- Excess earnings: £6.3 million in year one, declining with customer attrition
- Discounted over 12-year customer life at 15% discount rate
- Fair value: £28 million
This is a clean MPEEM application — the customer relationships are the primary income driver, contributory assets are identifiable, and the excess earnings are clearly isolable.
Decision Framework
1. Is the asset the primary income generator?
If yes, MPEEM is almost certainly the right method. Customer relationships in an acquisition are the classic example.
2. Does the asset have a binary or protective function?
If the asset protects value rather than generating it (non-compete, regulatory licence), With-and-Without is more appropriate.
3. Can contributory assets be identified and priced?
MPEEM requires credible CACs for every supporting asset. If this is feasible, MPEEM works well. If not, With-and-Without may be necessary.
4. Is the "without" scenario credible?
With-and-Without requires a realistic counterfactual. If the "without" scenario is too speculative (e.g., "the business without any customers"), MPEEM is more defensible.
Conclusion
MPEEM is the standard method for valuing the primary income-generating intangible asset in a business combination — most commonly customer relationships. With-and-Without is the method of choice when the asset's value is best understood through the impact of its absence, particularly for non-competes, key licences, and protective assets.
In complex acquisitions, both methods may be used across different asset classes. The valuation team should match each asset to the method that most faithfully captures its economic contribution. For the full methodological toolkit, see our Academy lesson on Valuation Methods: RFR, MPEEM, and With-and-Without.
The Bottom Line
MPEEM asks "what does this asset earn?" With-and-Without asks "what happens without this asset?" Both questions are valid — the right one depends on the nature of the asset. For primary income generators, use MPEEM. For protective or binary-impact assets, use With-and-Without.
Related Glossary Terms
Learn More
Ready to Value Your Intangible Assets?
Use Opagio's valuation tools to apply these methods to your own business.