The Moat Test: Which Competitive Advantages Survive Ten Years?
Moats erode faster than strategy decks admit. Score advantages for year ten durability — network, scale, brand, switching, regulation — before you bet the company on them.
Leadership lists advantages — brand, data, network, scale. Lists rarely ask which survive ten years of technology, regulation, and entrant capital. The moat test forces durability scoring before strategic reliance.
Constrange scores each claimed advantage on evidence today and erosion forces tomorrow — commoditisation, substitution, disintermediation, policy change. High score today with high erosion velocity is a trap.
Strategy built on eroding moats spends to defend the past while entrants build the future. The test is not pessimism — it is timing capital to advantages that compound.
Why moats fail quietly
Advantages decay while metrics still look fine — revenue lags erosion. By the time growth stalls, replacement moat is years away.
Technology commoditises former differentiators — support, analytics, integration — into table stakes.
Entrants subsidise entry to attack your weakest moat leg while you defend the strongest narrative.
| Advantage type | Durability question | Erosion force |
|---|---|---|
| Network effects | Does value rise with users? | Multi-homing, fragmentation |
| Scale economies | Unit cost falls with volume? | Cloud levelling, outsourcing |
| Brand | Trust reduces search cost? | Performance parity, scandal |
| Switching costs | Pain real on exit? | Standards, migration tools |
| Regulatory | Barrier licensed? | Policy change, capture |
Running the moat test
List top five claimed advantages. Score strength one to five with customer evidence, not internal belief.
Score erosion velocity one to five using explicit forces — new regulation, open standards, well-funded entrants.
Multiply or matrix strength and durability — prioritise investment to advantages with high strength and low erosion.
- Inventory claimed moats with evidence
- Score strength and erosion per moat
- Identify gaps between narrative and score
- Allocate R&D and GTM to durable legs
Investing in durable legs
Double down where strength and durability align — deepen switching through workflow, not contracts alone.
Harvest eroding legs — milk margin, minimise new capex — while building replacement.
Avoid moat cosplay — branding exercises without underlying advantage.
Building replacement moats
Replacement takes years — start before harvest ends.
Data moats need proprietary flow and model feedback loops — static data warehouses erode.
Ecosystem moats need partner economics that improve with scale — not logo slides.
“A moat you cannot name with evidence is a trench you are standing in.”Constrange
Board and investor conversations
Present moat test scores annually — changes signal strategic health better than single KPI.
M&A should improve durable score, not only add revenue.
Disclose erosion forces honestly — markets price surprises, not known decay.
Ten-year horizon
Ask which competitor would be happy you believe your moat is X — their strategy often targets the opposite leg.
When weak moats still win
Execution excellence and cost discipline win in commoditising markets — but strategy must admit commoditisation.
Niche depth can durably defend small ponds — scale moats fail but focus moats persist.
Regulatory moats need active stewardship — capture invites eventual backlash.
Questions worth putting in the next leadership review
- Where does our data on moat durability scoring actually live — and who owns updating it?
- What decision would we make differently if we trusted the number?
- Which incentive or reporting line is working against the outcome we want?
- What is the smallest test that would change our mind in ninety days?
Strategy work that stops at the slide deck is expensive theatre. The useful version is slower, messier, and more specific: name the constraint, measure the gap, assign an owner, and set a date when the number gets reviewed again.
Track feature parity time vs entrants — shortening parity means eroding product moat.
Monitor multi-homing in customer base — second supplier presence predicts network erosion.
Review patent and regulatory expiry calendars — cliffs are predictable.
Compare brand NPS to performance NPS — brand-only gap closes with parity.
Run moat test on acquired assets before integration spend.
The numbers in this article are illustrative ranges from client work and published benchmarks — not universal laws. Your organisation will have its own shape. The discipline is to measure yours rather than borrow someone else's headline.
Finance, operations, and commercial teams often use the same words with different definitions. Before any index or ratio goes on a dashboard, agree what counts in the numerator and who certifies it monthly.
Boards respond to frameworks when they see a decision attached. Pair every metric with a threshold and a pre-agreed action. Measurement without a trigger is reporting; measurement with a trigger is management.
Avoid benchmarking envy. Another company's attractive ratio may reflect a business model you do not have. Compare yourself to your own prior quarters first; external peers second.
Short-term fixes that improve a ratio while weakening the underlying economics are more common than admitted. When a metric moves, ask what behaviour it rewarded and whether that behaviour survives a bad quarter.
Track feature parity time vs entrants — shortening parity means eroding product moat.
Monitor multi-homing in customer base — second supplier presence predicts network erosion.
Review patent and regulatory expiry calendars — cliffs are predictable.
Compare brand NPS to performance NPS — brand-only gap closes with parity.
Run moat test on acquired assets before integration spend.
The numbers in this article are illustrative ranges from client work and published benchmarks — not universal laws. Your organisation will have its own shape. The discipline is to measure yours rather than borrow someone else's headline.
Finance, operations, and commercial teams often use the same words with different definitions. Before any index or ratio goes on a dashboard, agree what counts in the numerator and who certifies it monthly.
Boards respond to frameworks when they see a decision attached. Pair every metric with a threshold and a pre-agreed action. Measurement without a trigger is reporting; measurement with a trigger is management.
Avoid benchmarking envy. Another company's attractive ratio may reflect a business model you do not have. Compare yourself to your own prior quarters first; external peers second.
Short-term fixes that improve a ratio while weakening the underlying economics are more common than admitted. When a metric moves, ask what behaviour it rewarded and whether that behaviour survives a bad quarter.
Track feature parity time vs entrants — shortening parity means eroding product moat.
Monitor multi-homing in customer base — second supplier presence predicts network erosion.
Review patent and regulatory expiry calendars — cliffs are predictable.
Compare brand NPS to performance NPS — brand-only gap closes with parity.
Run moat test on acquired assets before integration spend.
The numbers in this article are illustrative ranges from client work and published benchmarks — not universal laws. Your organisation will have its own shape. The discipline is to measure yours rather than borrow someone else's headline.
Finance, operations, and commercial teams often use the same words with different definitions. Before any index or ratio goes on a dashboard, agree what counts in the numerator and who certifies it monthly.
Boards respond to frameworks when they see a decision attached. Pair every metric with a threshold and a pre-agreed action. Measurement without a trigger is reporting; measurement with a trigger is management.
Avoid benchmarking envy. Another company's attractive ratio may reflect a business model you do not have. Compare yourself to your own prior quarters first; external peers second.
Short-term fixes that improve a ratio while weakening the underlying economics are more common than admitted. When a metric moves, ask what behaviour it rewarded and whether that behaviour survives a bad quarter.
Track feature parity time vs entrants — shortening parity means eroding product moat.
Monitor multi-homing in customer base — second supplier presence predicts network erosion.
Review patent and regulatory expiry calendars — cliffs are predictable.
Compare brand NPS to performance NPS — brand-only gap closes with parity.
Run moat test on acquired assets before integration spend.
The numbers in this article are illustrative ranges from client work and published benchmarks — not universal laws. Your organisation will have its own shape. The discipline is to measure yours rather than borrow someone else's headline.
Finance, operations, and commercial teams often use the same words with different definitions. Before any index or ratio goes on a dashboard, agree what counts in the numerator and who certifies it monthly.
Boards respond to frameworks when they see a decision attached. Pair every metric with a threshold and a pre-agreed action. Measurement without a trigger is reporting; measurement with a trigger is management.
Avoid benchmarking envy. Another company's attractive ratio may reflect a business model you do not have. Compare yourself to your own prior quarters first; external peers second.
Frequently asked questions
How often to rerun the moat test?
Annually and after major market or regulatory shifts.
Can brand be a durable moat?
Yes where trust directly reduces risk and performance is hard to verify ex ante — finance, health, safety.
What if all moats score low?
Compete on cost, speed, and focus — and invest in building one durable leg deliberately.
Does the test apply to services firms?
Yes — switching costs and talent scale often matter more than network effects.