The Engagement Letter That Went Stale Before You Started
An engagement letter isn't a document you file once — it's a living scope that should follow the work. Here's how to stop yours from going out of date.
You sent the engagement letter in July. The client signed it. You filed the PDF somewhere sensible and got on with the work. Then October arrived, and the job you were actually doing had drifted a long way from what that letter described. A one-off BAS review turned into a full bookkeeping clean-up. A simple company return picked up a division 7A problem. The scope you agreed to in writing bore only a passing resemblance to the scope you delivered.
This is the quiet risk with engagement letters. Most firms treat them as a hurdle to clear at the start of a relationship — get it signed, move on. But the letter is meant to be the record of what you're on the hook for. When the work changes and the letter doesn't, you're carrying scope you never agreed to bill for, and exposure you never agreed to accept.
Why letters go stale
A signed engagement letter goes out of date for predictable reasons, and none of them are the client's fault:
- The work expands. You quoted for the return and ended up untangling twelve months of miscoded transactions first.
- A new service starts informally. The client asks you to "just have a look" at their super, or take over the payroll, and it never gets papered.
- Annual rollover. Last year's letter covered last year's work. This financial year's engagement was never formally re-issued.
- Fees change. You put your prices up but the client is still holding a letter that quotes the old figure.
Each of these is small on its own. Across a client base of a few hundred, they add up to a pile of work being done against terms that no longer describe it. When something goes wrong — a fee dispute, a complaint, a professional indemnity question — the letter is the first thing anyone looks at. A stale one is worse than none, because it says something you can't defend.
The letter should live where the work lives
The root problem is that engagement letters usually sit apart from everything else. The signed PDF is in a folder or an email thread. The work is on a board or in a spreadsheet. The client record is in Xero. Nobody looking at the job can see, at a glance, what was actually agreed and whether it still matches.
The fix is to connect the letter to the client and the work, so the scope is visible at the point where the work happens. Good accounting client management software treats the engagement letter as part of the client record, not a document filed away from it. When you open a client in your account practice management software, you should be able to see the current signed engagement, what it covers, what it prices, and when it was last updated — without hunting through a shared drive.
In Finye, the engagement letter is built into the client and the work, not bolted on afterwards. You draft it against the client record, send it for e-signing, and it stays attached to that client. When you're looking at the jobs on your board, the terms behind them aren't in a separate universe.
E-signing is the easy part — re-issuing is the discipline
Most firms have solved the mechanical side. E-signing means no printing, scanning or posting; the client signs on their phone and you have a timestamped, legally sound record in minutes rather than weeks. That's genuinely useful and it removes the excuse that letters are too much hassle to send.
But e-signing only helps if you use it more than once. The real discipline is treating re-issuing as a normal event, not an admin failure. That means:
- Re-scope when the work changes materially. If a job grows beyond what was quoted, send a short variation or a fresh letter before you do the extra work — not after, when it looks like you're chasing money.
- Refresh annually. Build re-issuing this year's engagement into your compliance cycle the same way you build in the return itself. A new financial year is a new engagement.
- Update on price rises. When fees change, the letter changes. Every client on the new price should be holding a letter that says so.
None of this is hard when the letter lives beside the client accounting work. It's hard when it lives in a filing system nobody opens between July and the following June.
Scope that holds up
A useful engagement letter does two jobs at once. It sets the client's expectations — what you'll do, what they'll provide, when, and for how much — and it protects you if the relationship sours. Both jobs depend on the letter being current.
Write scope in plain terms. List what's included and, just as importantly, what isn't. If the annual accounts and company return are in but the FBT return is out, say so. If the fee assumes the client delivers records in a usable state by a certain date, say that too, because it's the assumption that quietly breaks and drives write-offs. When the work starts to exceed the written scope, that's your signal to have the conversation — early, while it's a normal part of doing business rather than an awkward afterthought.
Close the loop between letter and work
The pattern to aim for is simple: no work starts without a current, signed engagement, and the letter is visible to whoever picks up the job. When onboarding a new client, the engagement letter is the gate — signed before the first task is assigned. When an existing job grows, the variation goes out before the extra hours go in. When the year turns, the letter turns with it.
Handled this way, the engagement letter stops being a document you send once and forget. It becomes a live description of the deal — one that matches the work you're actually doing, prices it correctly, and holds up if anyone ever needs it to. That's the difference between a letter that protects the firm and one that just proves what you failed to update.
If your letters currently sit in one system while the work sits in another, that gap is where scope drifts and terms go stale. Bringing them together — client, engagement and work in one place — is what keeps the letter worth the signatures on it.