[Your letterhead, if desired; if not, your return address]

[Date of letter-month, day, and year]

[Recipient's first and last names]
[Company name]
[Street or P.O. box address]
[City, State ZIP code]

Dear [recipient's name]:

I have been a longtime customer of your company and was quite displeased to discover that you have increased your prices by almost 25% in a very short time. This price increase creates a hardship for me and could very well cause me to discontinue my patronage with your company in favor of a company that offers more reasonable and affordable prices.

Please reconsider this price increase, and consider reverting back to your previous price structure. If you would like to discuss this issue with me, you may contact me at the phone number listed at the top of this letter. Thank you for your time.

Sincerely,

[Signature]

[Sender's first and last names]