Price increase notice with effective date + reason

I'm raising prices and need to email existing clients in advance. I want to do this with respect — not with a fluffy "thanks for being on the journey" email.

Business: {{business_name}}
Current pricing snapshot (top 3 services): {{current_pricing}}
New pricing (same 3 services): {{new_pricing}}
Average increase %: {{avg_increase_pct}}
Effective date: {{effective_date}}
Notice period (today to effective): {{notice_period}}
Real reason for the increase (cost / time / experience / years since last raise): {{reason}}
Any grandfathering (existing recurring clients at old rate for X months): {{grandfather_offer}}

Write a 180–220 word email.
- Subject: "Pricing update from {{effective_date}}"
- Open: tell them clearly there's a price change coming, and when. No "as you may know".
- One short paragraph: the real reason. Be honest. Reference how long it's been since the last increase if that helps.
- Side-by-side: current vs new prices on the top 3 services. Show the actual dollars.
- Grandfathering line (if applicable): who keeps the old rate, until when.
- One line: book before {{effective_date}} at current rates if they want one in early.
- Close: thanks, this lets me keep doing this well.
- Sign-off as {{your_name}}.

AU English. Direct + respectful. No "we hope you understand" — they will or they won't.