Price war or not? Responding to a competitor's price cut

1. Before you start

A competitor’s price cut is the moment a rival drops its headline price and everyone in your building looks at you. The instinct is to match — meet the new price so you don’t lose customers. The whole point of this course is that matching is usually the most expensive thing you can do, because a price cut hits the margin on every customer you keep, while it only ever saves the few who were actually about to leave. A tiny example: if you sell a plan for $40 that costs you $15 to serve, you earn $25 of contribution per customer; cut the price to $34 and you now earn $19 — you have handed back $6 on all of them to hold on to a handful.

Three honest statements before you start:

This is a Decide course. You read a situation, learn the ideas, and make a call. You do not write or run any code.
The companies below, Meridian Mobile and Harbor Fibre, are composite — invented firms built from ordinary figures so the arithmetic stays clean. No number is a claim about any real telecom company.
This is not a certification. It proves, to you, that you can decide how to respond to a competitor’s price cut and defend the call.

You need arithmetic and the discipline to separate the customers who are truly at risk from the ones who are not. That separation is the whole difficulty here.

2. The Situation

Meridian Mobile wakes up to a challenger carrier advertising the same core plan for $34 against Meridian’s $40, and the sales floor wants an answer today: match it, or hold. The revenue lead says “match before we lose the base”; the finance lead says “match and we give back six dollars on half a million customers to save the few who’d actually leave.” The call is yours, and both of them are arguing from one number each while the decision turns on three.

The trap is that matching feels like defending your customers when it is mostly a transfer of your own margin to customers who were never going anywhere — and the cut you match today is an invitation for the challenger to cut again tomorrow.

3. What you’ll be able to do

After this course you will be able to:

Decide whether to match, hold, or target retention when a competitor cuts price — using the margin on your whole base, not the fear of losing a few customers.
Judge whether a rival’s cut is a real threat or a bluff by reading its cost position, your customers’ switching costs, and how much its target segment even overlaps with yours.
Explain, in game-theory terms, why matching a cut invites the next one, and name the one change (in expected defection or in your margin) that flips the call from hold to match.

4. Prerequisites & time box

Prerequisites: arithmetic, and comfort with the idea of contribution (price minus the cost to serve one customer). Helpful but not required: the notion of customer churn as a rate. No spreadsheet needed, though one speeds the sums.

Time box: about 22 minutes of reading (measured), plus real thinking time on the call — this one rewards working the numbers yourself. That is under the 25-minute cap for a concept course.

Difficulty: 7 / 8 — a senior/director decision. Several factors move at once (the margin on your whole base, how many customers can actually leave, whether the rival can sustain its price, and what your response teaches the rival to do next), the obvious answer is usually the wrong one, and the right call is genuinely contestable. You are judged on the quality of the reasoning, not on landing a single “correct” price. A version with one at-risk segment and a handed-to-you defection number would be a 4; here you weigh the whole board.

Free-tier honesty: no signup, no special hardware, nothing to install.

5. The case & where the numbers come from

Meridian Mobile is a composite telecom carrier: its subscriber base, price, and cost-to-serve are in-course assumptions chosen for clean arithmetic, not drawn from or claimed about any real carrier. The frameworks — contribution margin, customer switching costs, price-war dynamics, and the game-theory reading of repeated pricing — are standard and cited in section 11. Every dollar below is an assumption; every profit figure is computed from these inside the course, so you can reproduce each one by hand.

The competitor-cut decision:

Item	Figure
Subscribers on the core plan	500,000
Meridian’s monthly price (ARPU)	$40
Variable cost to serve one subscriber / month	$15
Challenger’s advertised price	$34
Expected defection if Meridian holds at $40	6% of the base
Expected defection if Meridian matches at $34	1% of the base

Two things to hold onto. The defection figures are estimates of behaviour, not facts — the whole judgment is how much to trust them (section 6 shows the point where they flip the call). And “matching” here means dropping the price for every subscriber, not just the ones thinking of leaving; that distinction is where most of the money is.

6. The Concepts

The reflex to match, and why it destroys value

The reflex is to match: meet the rival’s price so no customer has a reason to switch. It feels like defence. The problem is arithmetic. A price cut lands on the margin of every customer you keep, but it only ever “saves” the customers who were genuinely about to leave — and those are almost always a small slice of the base.

Meridian earns $40 − $15 = $25 of contribution per subscriber. Cut to $34 and it earns $34 − $15 = $19 — a $6 giveback on every subscriber. If only about 6% of the base (roughly 30,000 of 500,000) was ever at risk, then matching spends the $6 cut on the other ~470,000 who were staying anyway: $6 × 470,000 ≈ $2.82m a month of margin handed to loyal customers to deter a defection they were never going to make. That is the value-destroying core of the reflex: you discount the many to hold the few. The rest of this section is about telling the few from the many before you reach for the price lever.

Is the cut a real threat, or a bluff

Before you respond at all, read the cut. Three questions decide whether it is a threat you must answer or a bluff you can wait out:

The rival’s cost position. Can they actually afford this price? A challenger running on a leased network usually has a higher cost to serve than an operator on its own infrastructure. A price set below the rival’s own cost is a promotion funded by someone’s patience, not a new market floor — and promotions end. If you match a loss-making price, you convert their temporary burn into your permanent lower margin.
Your switching costs. How hard is it for your customer to leave? Contracts, bundled home internet, number-porting friction, family plans, and loyalty perks are all switching costs — the barriers a customer must overcome to defect. High switching costs mean the headline gap moves far fewer customers than the panic in the room assumes.
Segment overlap. Is the rival even chasing your customers? A cut aimed at price-sensitive, low-usage prepaid users is not a threat to your high-value contract base. If the overlap between their target segment and your profitable base is small, the cut is loud but not dangerous to the customers who matter.

Only when the cut is sustainable for the rival, your switching costs are low, and the segments overlap is it a genuine threat that demands a price response. Miss any one of those and matching is an over-reaction.

Match versus hold, in margin terms

Now put numbers on match versus hold. Hold keeps the $40 price and accepts the estimated 6% defection. Match cuts to $34 and keeps almost everyone. Contribution per subscriber is $25 if you hold and $19 if you match; subscribers retained is the base times one minus the defection rate; monthly contribution is subscribers × contribution.

Hold: 500,000 × (1 − 0.06) = 470,000 subscribers × $25 = $11,750,000 a month.
Match: 500,000 × (1 − 0.01) = 495,000 subscribers × $19 = $9,405,000 a month.

Holding wins by $2,345,000 a month. Matching keeps 25,000 more subscribers and still loses, because the $6 cut on 495,000 people costs far more than the contribution on the extra subscribers it retains. Counting subscribers says match; counting contribution says hold.

The call flips only when the defection you avoid by matching becomes large enough. Hold and match earn the same when 500,000 × (1 − c) × $25 = $9,405,000, i.e. when the hold-case defection c ≈ 24.8%. In other words, you would have to believe that holding price loses you nearly a quarter of your entire base before matching pays — and even then, as the section below argues, matching invites the next cut. That threshold is the number to argue about, not the price.

(An interactive calculator sits here — enter the base, the price, the cost to serve, the price you would match to, and the two defection rates, and it returns the monthly contribution of holding versus matching and which one to choose. Push the hold-case defection up, or squeeze your margin, and watch the recommendation flip.)

Targeted retention beats an across-the-board cut

If some customers really are at risk, you do not have to choose between “cut for everyone” and “do nothing.” The third option is targeted retention: hold the headline price for the base, and spend a discount or a perk only on the specific customers who are genuinely about to leave.

The logic follows straight from the reflex trap. A blanket match spends $6 on all 500,000; a targeted save spends it only on the ~30,000 who were leaving — the same defence at a fraction of the cost, because you stop subsidising the ~470,000 who were staying anyway. The price never moves in the market, so it does not teach the rival that every cut will be met, and it does not reset the whole base’s expectations of what the plan costs. Targeted retention is how you answer a real but narrow threat without paying to hold customers who were never at risk. Its one requirement is that you can actually identify and reach the at-risk segment — which is exactly what a contract-expiry list or a usage signal gives you.

The game-theory view, and the next cut

Pricing against a rival is a repeated game: the same two firms face each other month after month, and each move teaches the other what to expect. That framing, from game theory, is why a single price cut is never really about this month’s price.

If you match every cut, you signal a policy: whatever you drop to, we will follow. To the rival, cutting now costs almost nothing to try — you will meet it, so they lose no customers to you by cutting, and they may gain against others. A committed match invites the next cut, and the one after, walking both firms down to a lower-price equilibrium where each earns less on the same customers. This is the price-war spiral, and it is a worse outcome for both — the strategic version of the margin math above. Holding, or answering narrowly with targeted retention, breaks the pattern: it tells the rival that a cut will not automatically be matched, so a cut actually costs them margin with no gain they can count on. The most important thing your response does is not defend this month’s customers — it teaches the rival whether cutting price against you is profitable or pointless.

The theory has limits worth naming. It assumes both firms read each other’s moves and act on margin; a rival burning venture cash to buy share may cut regardless of your response, and a rival with a genuine cost advantage can sustain a low price you cannot. When you truly cannot match a rival’s cost position, the game is not “hold and wait them out” but “compete on something other than price” — bundles, service, coverage — which is the strategy question beyond this course.

7. Your Call

You have seen how the reflex to match, the threat-versus-bluff read, the match/hold margin math, targeted retention, and the repeated-game view decide Meridian’s call. Now a different decision lands on your desk.

Harbor Fibre is a composite fixed-broadband provider — a different company in a different corner of telecom from Meridian’s mobile business. It has 200,000 broadband subscribers at a price of $60 a month and a variable cost to serve of $20, so it earns $40 of contribution per subscriber. A new fibre entrant has just advertised $50. The wrinkle Harbor faces that Meridian did not: 70% of Harbor’s base (140,000) is locked into 12-month contracts and cannot switch this quarter; only the 60,000 out-of-contract customers can actually defect. If Harbor holds, an estimated 40% of that out-of-contract group (24,000) leaves.

How this differs from the taught case (the transfer): this is a different company in a different part of the industry — a fixed-broadband provider, not a mobile carrier — and every figure is different, so the arithmetic must be redone from scratch. It also adds a constraint the mobile case did not have: most of the base is locked into contracts, so only part of it can defect at all, which changes where a price response can even help. The concept under test is unchanged — how to respond to a competitor’s price cut.

8. Self-check

Before you write the memo, make sure you can say each of these in one line:

Why does matching a competitor’s cut usually cost more than the defection it prevents — and which customers does the cut actually subsidise?
What three things tell you whether a rival’s cut is a real threat or a bluff, and how does each change your response?
What is the one number (the defection you would suffer by holding, or your own margin) that flips the call from hold to match — and why does committing to always match make things worse?

If any is fuzzy, reread section 6 — the reflex trap, the threat-versus-bluff read, the match/hold math, targeted retention, and the repeated-game view are the whole course.

9. Stretch

Push the decision further on your own:

Back at Meridian: hold the match price at $34 and solve for the hold-case defection rate at which matching finally beats holding. (You are looking for the c where 500,000 × (1 − c) × $25 = $9,405,000 — the genuinely hard part is then asking whether any honest forecast of your base is that pessimistic, and what evidence would justify it.)
At Harbor, suppose the entrant’s $50 is sustainable — it runs on its own cheaper network, not a leased one. Does your call change, and to what? Name the lever you would compete on if you cannot win on price.
Targeted retention assumes you can identify the at-risk segment. Where would that list actually come from for a broadband base, and what would you do if the only signal you had was noisy — a soft usage decline, not a contract about to expire?

10. Ship it — your decision memo

Write a one-page memo to Meridian’s leadership. State the call (do not match at $34 across the base; hold the price and answer the at-risk segment with targeted retention). Show the reasoning in two or three lines (holding earns $11.75m a month versus $9.41m from matching, because the $6 cut lands on ~470,000 loyal subscribers to deter the ~30,000 who were at risk; matching would only pay if roughly a quarter of the whole base defected on a hold). Name what you rejected (the blanket match, and doing nothing) and why. Name the one thing that would change your mind (a credible, sustained defection far above the estimate, or evidence the rival can hold its price). Keep it to a single page leadership grasps in two minutes. This memo is your own argued claim — not a credential.

11. Sources

Meridian Mobile and Harbor Fibre, and every figure attached to them, are composite and illustrative — constructed for clean teaching arithmetic, not drawn from or claimed about any real company. The frameworks used to reason about them are standard; references below.

Concept / claim	Source (publisher)	URL	Accessed
Competitive price cuts and the price-war spiral	Wikipedia — Price war	https://en.wikipedia.org/wiki/Price_war	2026-07-20
Contribution margin = price − variable cost	Wikipedia — Contribution margin	https://en.wikipedia.org/wiki/Contribution_margin	2026-07-20
Switching costs as a barrier to customer defection	Wikipedia — Switching barriers	https://en.wikipedia.org/wiki/Switching_barriers	2026-07-20
Customer defection / churn as a rate	Wikipedia — Customer attrition	https://en.wikipedia.org/wiki/Customer_attrition	2026-07-20
Retaining at-risk customers	Wikipedia — Customer retention	https://en.wikipedia.org/wiki/Customer_retention	2026-07-20
Repeated interaction between the same firms	Wikipedia — Repeated game	https://en.wikipedia.org/wiki/Repeated_game	2026-07-20
Lower-price equilibrium both firms are driven to	Wikipedia — Nash equilibrium	https://en.wikipedia.org/wiki/Nash_equilibrium	2026-07-20
ARPU as the per-subscriber revenue measure	Wikipedia — Average revenue per user	https://en.wikipedia.org/wiki/Average_revenue_per_user	2026-07-20

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