ACCOUNTING ENGAGEMENT LETTER
A accounting engagement letter between a provider and a client, ready to customize, send, and e-sign.
PREPARED FOR
Acme Co
PREPARED BY
Northwind Studio
DATE
August 18, 2026
ACCOUNTING ENGAGEMENT LETTER
An engagement letter from Northwind Studio outlining the accounting services, period covered, and reporting cadence for the coming year.
PREPARED FOR
Acme Co
PREPARED BY
Northwind Studio
DATE
August 18, 2026
Northwind Studio
ACCOUNTING ENGAGEMENT LETTER
This letter confirms the accounting services Northwind Studio will provide to Acme Co for the current fiscal year. It covers monthly close, annual tax preparation, and advisory work, with clear expectations on responsibilities, timelines, and fees on both sides.
PERIOD COVERED
12 months
Fiscal year with monthly close and reporting.
SERVICES
Full-cycle
Bookkeeping, tax preparation, and advisory sessions.
DELIVERY
Monthly
Financials and management reports delivered by the 15th.
Northwind Studio
ACCOUNTING ENGAGEMENT LETTER
The engagement runs across three coordinated streams. Each closes with a documented deliverable and a review touchpoint before the next period.
PHASE 1 · MONTHLY CLOSE
Bank and credit card reconciliation, categorization review, accruals, and a documented month-end close by the 15th of the following month.
PHASE 2 · TAX PREPARATION
Federal and state business return preparation, supporting schedules, review call with leadership, and e-filing with copies delivered for records.
PHASE 3 · ADVISORY
Quarterly review meetings, ad-hoc questions on transactions or structure, and a written year-end letter with recommendations for the following period.
Not included: audits, financial statement reviews or compilations, payroll processing, sales tax registration and filing across multiple states, and representation before tax authorities. Additional scope can be added in writing at any time.
Northwind Studio
ACCOUNTING ENGAGEMENT LETTER
Fees are a fixed monthly retainer for bookkeeping and advisory, plus a fixed annual amount for the tax return. Line items below map to the phases above.
| Item | Rate | Qty | Amount |
|---|---|---|---|
| Monthly bookkeeping and close | $1,200 | 12 | $14,400 |
| Annual tax preparation and filing | $2,500 | 1 | $2,500 |
| Advisory sessions | $350 | 8 | $2,800 |
| Total | $19,700 | ||
| Milestone | Share | Amount |
|---|---|---|
| On signature (setup) | Upfront | $1,200 |
| Monthly bookkeeping retainer | Monthly, 1st | $1,200 |
| Tax return | On completion | $2,500 |
Invoices are due within 15 days. The engagement begins on signature and continues through the fiscal year unless either party gives 30 days written notice.
Northwind Studio
ACCOUNTING ENGAGEMENT LETTER
To engage Northwind Studio for the year, complete the fields below and sign. The engagement is not scheduled until the signed letter is returned.
ENGAGEMENT START DATE
PRIMARY FINANCE CONTACT
CLIENT
Acme Co
PROVIDER
Northwind Studio
The Accounting Engagement Letter template is a five-page document for putting your year-long accounting engagement on paper before it starts. It carries an overview with stat cards, clear objectives, a three-stream scope of work, a fee table with a computed total, and an acceptance page with inputs and signatures.
It is intentionally simple: rename what needs renaming in Bonsai, list your actual services and rates, and set the terms. Merge fields handle the client details and date, and the last page collects a start date, finance contact, and both signatures.
Everything below comes pre-configured. Turn sections on or off, edit the copy, or add your own — Bonsai remembers your choices for next time.
Can I edit every section? Yes — every heading, paragraph, stat, table row, and signature block is fully editable in Bonsai.
Can I add more pages? Yes — add, reorder, or duplicate pages once the template is open.
Do merge fields auto-fill? Yes — Sender, Receiver, and Date pull from your client contact and the current date automatically.