What it means
A price increase notice is how a supplier tells customers that costs have risen and prices are changing, giving them enough information to budget, compare options or exercise any right to reject or cancel. Start with the agreement itself: does it allow an increase during a fixed term, at renewal or only by mutual agreement?
Then check the law for the customer and product, because consumer and business contracts may be treated differently, regulated services can have special notice rules, and the UK Competition and Markets Authority warns that terms allowing later price changes can be assessed for fairness in consumer contracts. State the old and new price in the same units, since $100 per month becoming $115 per month is clearer than "a 15% adjustment" alone.
Show tax, service fees or usage charges where they affect the actual bill. Give the effective date and first affected invoice, because a price change on 1 June may appear on a bill issued earlier or later depending on billing cycles, and explain any pro-rated amount so a customer can reconcile it.
Separate customer segments, because a new sign-up price may change immediately while existing customers retain a contractual rate until renewal. Provide a reason when helpful, without making unverifiable claims, since rising supplier costs or new features can explain a decision but should not obscure the exact amount.
Use a channel the contract and law permit and keep proof of delivery, as email may be appropriate for one service while another requires a particular address or method. Make customer choices clear: can they change plan, negotiate, cancel before the increase or keep an existing contract until its end?
Give enough lead time for a genuine decision under the applicable rule, because a message sent one day before an annual subscription renewal may be too late if the contract requires more notice. For a tiered or usage price, include a worked example, since a 10% rise in the unit rate may affect a high-volume buyer differently from a low-volume one, and show the rate table and how existing credits or minimum commitments are treated.
Coordinate systems before sending, so that billing, sales and support use the same effective date and plan mapping. Train support staff to explain the change, identify contractual exceptions and route disputes.
Treat a price increase notice as a representation, not marketing decoration, and verify the actual audience and price file before release. When a customer objects, check their contract and history, because some may have negotiated caps or promises that standard systems do not show.
Measure impact after the change by tracking churn, complaints, revenue per customer and payment failures, allowing for seasonal effects. Keep the prior notice and price version, since disputes often arise months later when someone compares invoices; for a business owner, clarity is the best protection, so verify the right to change, identify who is affected, give a real choice where required and make billing match the notice.
In practice
Real-world examples.
Example
A supplier tells month-to-month customers their plan moves from $100 to $115 on 1 June and names the first affected invoice. The notice states the extra $15 a month and explains any pro-rated amount for customers billed mid-cycle. It also lists the options to change plan or cancel before the date.
Example
A fixed-term client is excluded from the increase until its contractual renewal, despite a general public price change. The account manager confirms the renewal date in writing and states the rate that will then apply. Billing is flagged so the new price cannot be charged early.
Example
A usage-based storage service shows both the old and new unit rate and an example bill for a common usage level. It also explains how existing credits and minimum commitments are treated. Support receives the same rate table so that every answer matches the notice.
Formula
Calculation
Percentage increase = (new price - old price) / old price x 100
Worked example. A fictional plan rises from $100 to $115 a month.
- The increase is $115 - $100 = $15, and $15 / $100 x 100 = 15%.
- Over twelve months the customer pays $15 x 12 = $180 more.
A usage price shows why a worked example helps. If a unit rate rises from $0.50 to $0.55, a buyer using 2,000 units sees the bill move from 2,000 x $0.50 = $1,000 to 2,000 x $0.55 = $1,100, an extra $100. A small buyer with 200 units and an unchanged $20 monthly platform fee goes from $20 + 200 x $0.50 = $120 to $20 + 200 x $0.55 = $130, an extra $10, which is $10 / $120 = 8.3% and not the headline 10%.
This arithmetic does not establish contractual permission or adequate notice.Case study
Seen in the real world.
This entirely fictional example concerns Northline Software, an invented subscription business. It planned a 12% rise but discovered that some enterprise customers had fixed rates for another year. Finance separated cohorts and checked each effective date before communication. The notice showed the old and new monthly rates, first affected bill and available plan choices. Support received a record of exceptions, and billing was tested before launch.
The case does not prescribe a legal notice period. In the invented aftermath, Northline tracked churn, complaints and payment failures for three months, allowing for seasonal effects. Of 400 notified customers, six queried their amount, and each was answered from the exception record and the stored price version. The team kept the notice and price file so that a later invoice dispute could be settled from evidence.
Watch out
Common mistakes.
- Announcing an increase without checking whether existing contracts permit it.
- Giving only a percentage while hiding the new bill, effective date or affected products.
- Sending the notice to the wrong cohort, then billing a fixed-price customer at the new rate.
Questions
People also ask.
What is a price increase notice?
It tells customers what price will rise, when and what options they have.
How much notice is needed?
It depends on the contract, product and local law; there is no universal notice period.
Should a reason be given?
A concise honest reason can help, but exact price and timing must remain clear.
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