For solo bookkeepers

Bookkeeping engagement letters, signed in minutes.

Before you touch a single transaction, get the scope, fees, and responsibilities agreed in writing. FirmForms turns your bookkeeping engagement letter into one signing link and keeps a sealed record, for a flat $35/mo.

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Every bookkeeper knows the pattern. A client asks you to "just take a quick look," a cleanup turns into six months of catch-up, and payroll quietly gets added to a scope you never agreed to. Without a signed engagement letter, the boundaries of the work live only in memory, and memory is a poor defense when a client disputes a bill or the books turn out worse than they said. A clear engagement letter fixes the scope, the fees, and the record before the work begins.

Why it matters

Why bookkeepers need an engagement letter

  • It stops scope creep. When the work is defined in writing, "can you just add payroll" becomes a new line and a new fee, not an unpaid favor.
  • It sets a liability boundary. Stating plainly that you provide bookkeeping, not tax advice, audit, or assurance, is one of the clearest ways to limit what you can be held responsible for.
  • It defines deliverables and cadence. Monthly reconciliation, categorization, and statements by a set date read very differently from a vague promise to "keep the books."
  • It puts fees and billing in writing. Recurring monthly fee, cleanup fee, and out-of-scope rate, agreed up front, prevent the awkward invoice conversation later.
  • It reads as professional. A clean, signed letter signals that you run a real practice, which is exactly the impression that wins better clients.
The essentials

What a bookkeeping engagement letter should cover

The sections most bookkeeping engagements need, in plain terms.

Services in scope

Exactly what you will do: reconciliation, categorization, monthly financial statements, and how often.

What is out of scope

What you are not doing, such as tax preparation, audit, assurance, or advisory, unless separately agreed.

Fees and billing cadence

Recurring fee, any cleanup fee, the rate for out-of-scope work, and when invoices go out.

Client responsibilities

Providing complete, accurate, and timely records and access, and owning the underlying data.

Term and termination

When the engagement starts, how long it runs, and how either side can end it.

Liability and confidentiality

A limitation of liability and a clause on how you handle the client's confidential information.

Want a head start? Build a free engagement letter template, then tailor the scope and fees per client.

How FirmForms helps

From draft to signed, without the chase

Send a signing link

Turn your engagement letter into one link. Your client signs in their browser, in minutes.

Sealed, court-ready record

Every signed letter is sealed into a PDF with a certificate of completion and an audit trail: created, sent, opened, signed, with timestamps and IP.

Flat $35/mo

One price for the whole practice, every user included, cancel anytime. Add your own Pay now link after signing.

Questions

Bookkeeping engagement letter FAQ

Do bookkeepers need an engagement letter?

An engagement letter is strongly recommended for any bookkeeping engagement. It puts the scope of work, fees, billing cadence, and each side's responsibilities in writing before the work starts. That protects you from scope creep, sets clear expectations with the client, and gives you a defensible record if a disagreement ever comes up. It is not legally required, but most professional bodies and insurers treat a signed engagement letter as a basic standard of practice.

What should a bookkeeping engagement letter include?

A solid bookkeeping engagement letter covers: the services in scope (for example monthly reconciliation, categorization, and financial statements), what is out of scope (such as tax preparation, audit, assurance, or advisory work), fees and billing cadence, client responsibilities like providing complete and accurate records, the term and how either side can end the engagement, a limitation of liability, and a confidentiality clause. Tailor the scope and fees to each client rather than reusing one letter unchanged.

Is a bookkeeping engagement letter legally binding once it is e-signed?

An electronically signed engagement letter is generally valid and enforceable in the United States under the ESIGN Act and UETA, the same as a wet-ink signature, provided both parties consented to sign electronically. FirmForms captures that consent at the moment of signing and seals the signed letter into a PDF with an audit trail. This is general information, not legal advice; consider having counsel review your engagement letter.

How is a bookkeeping engagement letter different from a tax engagement letter?

The structure is similar, but the scope differs. A bookkeeping engagement letter should make clear that you are providing bookkeeping services, not tax preparation, audit, or assurance, unless those are separately stated. If you also prepare tax returns or payroll, spell out each service and its fee explicitly. Being precise about what you are and are not doing is the main way an engagement letter limits your liability.

Can I reuse the same engagement letter for every client?

Start from a consistent template so nothing important gets left out, then tailor the scope, deliverables, cadence, and fees for each client. A cleanup engagement is not the same as ongoing monthly bookkeeping, and the letter should say so. FirmForms lets you save a reusable template and adjust the details per client before you send it.

Send your next bookkeeping engagement letter in minutes.

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FirmForms is software for sending and signing engagement letters. Templates and the sections described here are editable starting points and general information, not legal advice. Consider having counsel review your engagement letter before you use it with clients.