Pattern/Economics/No. 1010
Switching Costs
Switching costs are the added costs of moving to a new supplier or system. In economics, they include fees, setup work, lost data and time spent learning. Paul Klemperer studied how these costs can keep customers with one firm and shape price competition.
- Evidence
- Well established
- Read
- 6 min
- Links
- 12 connections
01You've seen this when…
- in life
You find a cheaper phone plan. Your current carrier charges an early-exit fee, and checking whether your handset works on the new network eats up your evening.
- at work
A new payroll service costs half as much. Then finance lists the work: move employee records, rebuild integrations, check tax settings and train everyone who runs payroll.
- out in the world
A city considers replacing its permit software. Years of records sit in a proprietary format, and the current vendor charges to convert them.
02The idea
A better offer has to clear two hurdles: it has to improve on the current arrangement, and that improvement has to cover the cost of changing. Switching costs are the second hurdle.
Some arrive as invoices. Others consume evenings, interrupt work or put something valuable at risk. Moving banks means updating payments. Replacing software means transferring records and learning unfamiliar controls. Changing an industrial supplier can require new tools and fresh quality checks.
These costs give an existing supplier an advantage. A rival must offer enough extra value to pay for the move. When that hurdle becomes too high, the customer experiences lock-in: alternatives exist, but leaving is expensive enough to make them unattractive.
The distinction from the sunk cost fallacy matters. Sunk costs are spending that cannot be recovered. Switching costs are consequences of the next decision. The hours already spent learning a program are sunk; the hours needed to learn its replacement belong in the comparison.
03Why it happens
- Contracts put a price on departure. Cancellation fees, minimum commitments and lost loyalty benefits make an otherwise simple move expensive. A supplier can build these terms into the original deal.
- Systems accumulate dependencies. Saved records, custom settings, integrations and equipment become fitted to one provider. Asset specificity describes investments whose value depends on a particular relationship or use.
- People acquire local expertise. Familiar menus, keyboard shortcuts and routines make the current system efficient. A replacement brings a period of slower work and more mistakes, even if it eventually performs better.
- A move exposes the customer to uncertainty. An unfamiliar supplier might mishandle a transfer, provide weaker support or fail to deliver promised features. Investigating those risks takes time, and some uncertainty remains.
These barriers also change how firms compete. A company may offer an attractive introductory deal to acquire customers, expecting to earn more once they face costs of leaving. Rivals may respond with migration services, buyouts of exit fees or discounts large enough to overcome the barrier.
The same firm can compete fiercely for new customers while giving established customers a weaker deal. That gap is a useful place to look.
04A worked example
U.S. wireless number portability began in 2003, allowing customers covered by the rules to change carriers while keeping their phone number. Before portability, losing a number could make switching particularly costly for someone whose business depended on customers knowing it.
For illustration, imagine an electrician considering a plan that saves $15 a month. Changing numbers would cost an estimated $400 in replacement printed materials and time spent updating clients. These figures are illustrative.
What it looks like The electrician keeps a more expensive plan despite an offer that saves $180 a year.
What’s actually going on The $400 changeover cost takes about 27 months of savings to recover. Over a shorter expected period, staying can make financial sense. The current carrier benefits from the electrician’s dependence on an established number.
What would have helped Number portability removes this particular barrier. Other costs can remain, including contract fees, handset compatibility and the work of arranging the transfer. The FCC advises customers to start the port through the new provider and keep the existing service active until the process is complete.
05How to spot it
06What to do about it
- Calculate the whole move. Add exit fees, setup work, training, downtime and expected transition risks. Include the opportunity cost of the people doing the migration. Compare that total with the benefits over the period the replacement is likely to be used.
- Test the exit before entering. Export a sample of data and try opening it elsewhere. Check whether attachments, history and relationships between records survive. For a physical system, check compatibility and replacement-part availability.
- Negotiate departure terms early. Before signing, settle who owns the data, what export costs, what assistance is available and how renewal works. Bargaining power usually falls after dependence grows.
- Ask the challenger to help fund the move. Migration support, parallel operation and reimbursement of exit fees can lower the hurdle. Include the challenger’s own future exit terms in the assessment.
- Keep a usable way out. Maintain backups, document integrations and use transferable formats where practical. This preserves option value: the ability to change later if prices, quality or needs shift.
Give the current supplier a scheduled review date. A review turns staying into a fresh decision and catches rising prices before they disappear into routine. Where a move carries operational risk, test a small part first and keep a rollback path.
07Where it doesn’t weaken competition
Switching costs can coexist with aggressive competition. Firms may compete through low entry prices or migration assistance. Customers who anticipate later costs can demand compensation at the start. The outcome depends on how much buyers know, how contracts work and whether rivals can make departure easier.
Staying can also be sensible. Reliable service, familiar workflows and compatibility have value. A move should earn back the disruption it creates.
Network effects are closely related. They make a product more valuable as other people use it. Switching costs make changing products expensive. A team messaging service can have both: colleagues supply the network value, while archived conversations and connected tools supply barriers to moving.
08Roots
In 1987, economist Paul Klemperer modeled markets where a customer’s first purchase changes the next one. Learning one firm’s equipment, for example, leaves the buyer with skills that a rival’s equipment may require them to replace. The puzzle was how firms would price when today’s sale could create tomorrow’s dependence.
Industrial economists had already examined such barriers. Carl Christian von Weizsäcker’s 1984 paper, The Costs of Substitution, was an earlier contribution. Klemperer’s work helped make switching costs a central explanation of competition over time: firms compete to acquire customers, then compete under the constraints created by those earlier choices.
The idea traveled easily from equipment and repeat purchases to banking, telecommunications and software. Each field supplied a concrete version of the same problem: payment instructions, an established phone number, or years of records that a rival system struggles to import. Portability and interoperability became ways to change the terms of competition.
09How solid is this?
Switching costs are supported by extensive economic theory and documented contractual, technical and learning barriers. Their effect on competition varies: entry discounts, customer foresight and portability can offset some of the incumbent’s advantage.
10Connections
- Often confused with Sunk Cost Fallacy, Transaction Costs
- Can lead to Path Dependence, Status Quo Bias, Lock-In
- Can follow fromAsset Specificity
- See also Endowment Effect, Jobs to Be Done, Network Effects, Option Value, Opportunity Cost, Incomplete Contracts
+ 2 more in the list
11Origin and sources
Developed in industrial economics before Paul Klemperer’s influential 1987 analysis. Earlier contributions include Carl Christian von Weizsäcker’s The Costs of Substitution (1984).
- [1]Klemperer, P. (1987). Markets with Consumer Switching Costs. The Quarterly Journal of Economics, 102(2), 375–394.
- [2]Klemperer, P. (1995). Competition when Consumers have Switching Costs: An Overview with Applications to Industrial Organization, Macroeconomics, and International Trade. The Review of Economic Studies, 62(4), 515–539.
- [3]von Weizsäcker, C. C. (1984). The Costs of Substitution. Econometrica, 52(5), 1085–1116.
- [4]Federal Communications Commission. Porting: Keeping Your Phone Number When You Change Providers.
Suggest an edit· Updated 2026-10-02