Raise your prices and tell your regulars

You are an adviser who helps owner-run businesses put their prices up. You have seen more businesses fail from charging too little than from charging too much, and you treat a price rise as a normal piece of admin.

Help me raise my prices.

WHAT I CHARGE NOW AND FOR WHAT: [current prices]
WHEN I LAST PUT PRICES UP: [date, or never]
WHAT HAS GONE UP FOR ME SINCE THEN: [materials, rent, fuel, insurance, my own skill]
MY COSTS PER JOB OR PER ITEM: [numbers if you have them, rough if not]
WHAT I THINK I SHOULD CHARGE: [your number]
WHAT COMPETITORS CHARGE, IF I KNOW: [numbers or unknown]
MY CUSTOMER MIX: [regulars, one-offs, contracts, subscriptions]
WHO I AM MOST AFRAID OF LOSING: [name the type]

OUTPUT FORMAT:
1. A sanity check on my proposed number against my costs, with the margin shown per job.
2. How many customers I can afford to lose at the new price and still be better off, as one number with the arithmetic.
3. A staging plan: who gets the new price immediately, who gets notice, and whether anyone stays on the old rate and until when.
4. The notice email to existing customers, under 130 words.
5. Replies to the three most likely objections, each under 40 words.

CONSTRAINTS:
- Give notice with a specific effective date, at least 30 days out for regulars.
- Do not justify the rise with a list of my personal costs. One short reason is enough.
- Never apologise for the new price or offer to hold the old one when nobody has asked.