Key takeaways
- Test every tool with one tax engagement and one recurring bookkeeping engagement before you buy.
- A proposal signature is not a Form 8879 signature, and the two should not share a document.
- Put the section 7216 consent in its own signing item, because a consent that is a condition of hiring the firm is involuntary.
- Lock the signed document so a later fee change creates a new version, not an edit to the signed one.
- Decide which system is the client record before the proposal is accepted, so the signed letter is not typed in again.
What the tool has to do for an accounting firm
A generic proposal tool sends a deck, tracks opens and takes a card payment. A firm needs the same document to carry a scope that names the work, a fee table that repeats each month or season, a signature from the person who can bind the client, and a timestamped record that the terms were accepted before work began on tax year 2026 engagements.
Test each tool with a real engagement. Build one tax proposal and one monthly bookkeeping proposal, sign both and export the signed PDFs. If the signed copy does not show the fee table, the scope and the signer's name with the signing time, the tool will not serve as the engagement letter file.
Engagement letter templates for tax and bookkeeping
Tax and bookkeeping letters differ where it matters. A tax letter names the return types, the tax year, who signs the return and the date by which missing documents must arrive. A workable opening line is "We will prepare your 2026 federal income tax return from the records you provide." A bookkeeping letter names the accounts in scope, the close frequency, the reconciliation work and who holds bank and card access.
Decide the responsibility paragraph first. If the firm prepares the return from a trial balance the client supplied, the letter should say the firm did not audit or verify those records. If the firm prepares it from books the firm keeps, the letter should say the return relies on those books. A generic consulting letter does not say who signs the return, and that is the first thing a client disputes.
Check whether tax and bookkeeping letters sit in separate templates and whether you can edit the scope table without touching the legal paragraphs. If one edit changes the other, a fee change can alter terms the client already signed.
Keep the section 7216 consent out of the fee signature
If the firm will use or disclose a client's tax return information for anything beyond preparing the return, Treas. Reg. 301.7216-3 says the preparer may not do so before obtaining a written consent. The consent must include the name of the tax return preparer and the name of the taxpayer, and the taxpayer must sign and date it.
The same regulation says that conditioning the provision of services on the consent makes the consent involuntary. A checkbox that reads as the price of hiring the firm is a defect, even if the client ticks it. Put the consent in its own signing item, let the client decline it, and state the result in the letter as a sentence such as "If you decline the separate consent, we will still prepare your return" so the client knows the decision is theirs.
What the signature in a proposal tool is
The signature a proposal tool captures is a drawn or typed signature on a PDF. It is not a Form 8879 signature. The IRS describes Form 8879 as the declaration document and signature authorization for an e-filed return, completed with an electronic return originator (ERO). Keep the two in separate documents.
Ask each vendor three questions in writing. Does the signed PDF carry an audit page with the signer's name, email address, IP address and timestamp? Can the signed document be locked so a later fee change makes a new version? Can the firm download the signed PDF and the audit page without the vendor account staying active?
Failure mode: the client signs a proposal, the fee is edited later and the signed PDF now shows the new number. Fix it by locking the document at signature and issuing a new proposal number with a new signature request for any change.
Pricing tables for recurring services
A recurring fee needs a table with one line per service, its monthly amount, its annual total and its start date. A single total hides which part is the retainer and which part is the season fee, and the client will ask about that split at renewal.
Check whether the tool recalculates recurring fees at renewal and whether the renewal notice shows the old and new amounts side by side. Attach the fee table to the renewal email rather than sending only a link.
Agiled's public pricing page lists four plans, all billed annually: Starter at $24 per month, Pro at $59 per month, Business at $99 per month and Scale at $199 per month. It lists a 14-day free trial and no free plan. Some comparison posts describe a free plan, so confirm the current plan on the vendor page before you budget for one.
How the main options compare on price and terms
Proposify publishes Build at $49 per user per month billed monthly or $39 per user per month billed annually, Grow at $65 per user per month billed annually, and Scale at $107 per user per month with a $12,800 per year platform fee that includes 10 users. Its trial is 14 days with no credit card. Seat pricing means the cost moves with headcount, so count the staff who will send proposals.
Ignition's public pricing page lists no dollar amount for its plans. Its deals pipeline and online forms add-ons show only "p/m (unless included)", and its enterprise plan is priced on request. It offers a 14-day free trial with no credit card. Run a recurring engagement through it before you commit.
TaxDome's pricing page did not load during this review, so no price is listed here. Comparison posts describe it as a bundle of engagement letters, e-signature, a client portal, workflows and billing.
DocuSign is a signature tool. Comparison posts describe it as collecting the signature on a letter, not building the proposal or the fee table.
The handoff from accepted proposal to onboarding
The usual failure is a signed letter sitting in the proposal tool while the client record, document request and billing schedule are typed again by hand. Decide before buying which system is the client record, and make the proposal send the client name, entity type, services, fee schedule and signed date to it.
Decision rule: if the firm will speak with the IRS for the client, ask for Form 2848 as a separate signed item that lists the tax years and forms. If the firm only needs to see the client's IRS account information, ask for Form 8821 instead. Filing Form 2848 does not revoke a Form 8821 already in effect, so check both before assuming one covers the other.
For any contractor or vendor the bookkeeping engagement pays, ask for a Form W-9 before the first payment. The current Form W-9 is labeled 03/2024, so check the revision on the form the vendor returns. The collection steps are in the linked 1099 guide.
Usual covers the request side of this handoff: client document requests, reminders and a client portal once the engagement starts. It does not write proposals, fee tables or engagement letters, so pair it with a proposal tool or your standard letter.
Failure modes and the fix for each
Mismatched scope. The client signs a proposal listing monthly bookkeeping while the file copy of the letter says annual tax preparation. Fix it with one service list: the proposal pulls its scope table from that list and the signed letter prints the same table.
Consent as a condition. One checkbox covers both the engagement and the section 7216 consent. Fix it with a separate signing item and a written decline option, as described in the consent section above.
Silent renewal change. The fee rises at renewal, the client keeps the old PDF and the new amount appears only in the tool. Fix it with a dated renewal notice that attaches the old and new fee tables.
Duplicate client record. The proposal tool creates a client and the practice system creates a second one under a different legal name. Fix it by creating the client once, from the signed proposal, and naming the record system in the letter template.