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Intermediate

What is a moat

Also known as: economic moat, competitive moat

Definition

A moat is a lasting advantage that stops competitors from copying a business and taking its customers, such as switching costs, a network effect or lower costs.

Why it matters

A good product attracts competitors, and a moat decides what happens to your margins when they arrive.

Common mistakes

Counting good service or a head start as a moat. Both help, but a competitor can copy them.

Related terms

Worked exampleIllustration

Margins after a competitor enters

Illustrative numbers: a fictional clinic booking app, no real business.

  1. Before

    In its second year the app keeps a gross margin of 60% on the clinics it serves.

    60%

  2. The competitor

    A rival launches the same kind of booking app at a lower price.

  3. Without a moat

    To keep its clinics the app cuts its price, and the gross margin falls.

    60% → 45%

  4. With switching costs

    Three years of appointments, patient reminders and history live in the app, and moving them takes weeks. 90% of the clinics stay at the old price.

    about 58%

The moat is not what makes you better. It is what makes leaving expensive.

Illustration

Five sources of a moat

The moat: Switching costs, Intangible assets, Network effect, Cost advantage, Efficient scale12345⁨Your business⁩

Leaving is expensive: a clinic's three years of appointments and patient history live in the app, and moving them takes weeks.

A moat is what stops a rival from taking your customers after they copy you. Tap a part of the water to see one source.

Margin after a competitor enters

Gross margin 60% before a rival enters. Without a moat it falls to 45%, with switching costs it holds near 58%.0%30%60%58%45%⁨Year 2⁩⁨Rival enters⁩⁨After⁩
  • With switching costs
  • Without a moat
The gold line is the app with switching costs: 90% of the clinics stay at the old price.

Definition

A moat is a durable competitive advantage: something about the business that lets it keep its customers and its margins after competitors see how well it does. Morningstar, which rates companies on it, names five sources: switching costs, intangible assets (patents, licences and a brand customers pay more for), a network effect, a cost advantage, and efficient scale, a market too small to invite another player. Good service or a head start is not on the list, because a competitor can copy both.

Why it matters

Without one, the only answer to a cheaper rival is a lower price. Investors ask founders how they will defend their margins for the same reason. For a small business the test is simple: if a competitor opened next door tomorrow with a lower price, what would stop your customers from leaving?

Directly related: Scaling, Product-Market Fit, Gross margin.

Improvement tips

  • Build switching costs by becoming part of the customer's daily work: their data, their history, their routine.
  • Look for a network effect, where each new user makes the product more useful to the others.
  • Register what can be registered, patents and trademarks, and keep the know-how inside the business.
  • Test your moat with one question: if a cheaper rival opened tomorrow, why would customers stay?

Common mistakes

  • Calling brand awareness a moat. A brand counts only when customers pay more for it.
  • Chasing new customers while building nothing that makes them stay.
  • Underestimating how fast technology or regulation can wear an advantage down.

Related terms

StartupsIntermediate

Scaling

Scaling is growth in which revenue rises faster than costs, so each extra customer adds more profit. In plain growth, costs rise at the same pace as revenue.

StartupsIntermediate

Product-Market Fit

Product-market fit is when a product satisfies a real market so well that customers stay, come back and bring others without being pushed.

FinanceBeginner

Gross margin

Gross margin is the share of revenue left after the cost of goods sold: (revenue - COGS) ÷ revenue × 100. At 60%, 60 agorot of each shekel remain.

StrategyBeginner

Red flag

A red flag is a warning sign in a business, deal or partner that tells you to stop and check before you commit more money or time.

FinanceBeginner

Net Profit

Net profit is what a business keeps from revenue after every expense, cost of sales, running costs, interest and tax. It is the bottom line, not cash.

From the blog

Why Investors Still Back High-Risk Startups

A founder-facing explanation of startup investment logic, portfolio risk, traction signals, and why investors look beyond the pitch deck.

Quick check

Which of these is a moat in Morningstar's sense?

Choose an answer

Frequently asked questions

Do I need to build a business moat before I launch my startup?
Not a finished one, but you need a plan for how you will defend the business once competitors arrive. Investors will ask how you will protect your margins.
When does a moat first become relevant for a new business?
As soon as you show traction, because success attracts copies. Switching costs and data build slowly, so start early.
Can I build a moat for my startup without spending money on patents?
Yes. A patent is one kind of intangible asset. Switching costs, a network effect, a cost advantage and efficient scale need no patent.
How does a moat affect my startup's valuation?
A business that keeps its margins after competitors arrive is worth more over time, so investors ask how you will defend your margins. A clear answer about your moat is part of a credible pitch.
Why does a moat matter if my business is currently highly profitable?
High profits attract competitors who try to undercut you. Without a moat, margins shrink as rivals take customers on price.
How do I build a moat for an existing service business?
Through what is hard to copy: your clients' data and history in your systems, long term contracts, a brand clients pay more for, or a cost advantage from the way you work. Good service alone is not enough, because a competitor can offer it too.
What goes wrong when a business relies on a head start instead of a moat?
Competitors copy the features and the marketing, and the lead disappears. Use the head start to build something that lasts, such as data, a network or scale.
What does a moat mean for investors?
Analysts rate a company's moat as none, narrow or wide. Morningstar calls a moat wide when it expects the advantage to last at least 20 years and narrow when it expects at least 10. The five sources are the same ones a founder can build.
Where does the word moat come from?
Warren Buffett used the image in a Fortune article of 22 November 1999, hosted on Berkshire Hathaway's site: "The products or services that have wide, sustainable moats around them are the ones that deliver rewards to investors."
What is a business moat in simple words?
Like the water around a castle, a moat keeps attackers out: an advantage rivals cannot easily copy, which protects your customers and your margins.
Do I need an intellectual property lawyer to build a moat?
For patents and trademarks, which are registered with the Israel Patent Office, a patent attorney or a lawyer helps. Switching costs and a network effect need no legal filing. Educational material, not legal or tax advice. Check your own case with a lawyer or an accountant.
Will building a moat cost my startup money?
It depends on the source. Patent and trademark filings carry fees, while switching costs and a network effect cost product work and time more than cash.

Sources: Morningstar Economic Moat Rating and its five sources of moat, as set out in VanEck, "What Makes a Moat? Morningstar's Five Sources of Moat", January 2025 (vaneck.com), Warren Buffett, "Mr. Buffett on the Stock Market", Fortune, 22 November 1999 (berkshirehathaway.com)

Last reviewed: 2026-09-24

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