An accountancy client is not one person with one need, it is an entity with a recurring calendar of obligations and usually several people attached to it. That shape is what makes generic client software frustrating for a practice: it holds the contact well and the entity badly, and the entity is what the work is actually about. Three differences matter enough to check before buying.
The entity is the client, the people are attached to it
A limited company, its directors, its bookkeeper and possibly its outside adviser are all attached to a single client, and every one of them may need to be contacted or given access. Software that models a client as a person forces the entity into a company-name field and loses the distinction between the client and the people who speak for it. The practical consequence turns up at access time, when you want the bookkeeper to see one thing and the director another, and there is only one login because there was only ever one person.
The year repeats, and the record should know that
Most of an accounting relationship is a recurring cycle: the same obligations, the same document requests, the same deadlines, per client, per year. A client book that treats every year as unrelated events makes the practice rebuild the same request list annually. One that holds the cycle against the client lets last year's list become this year's starting point, which is where the time actually comes back. This is the single biggest difference between software built for accountants and software adapted for them.
Documents arrive from the client, not from the practice
In most industries the practice sends documents out. In accounting the dominant flow is inward and chased: records, statements, receipts, signatures, arriving late from people who have other jobs. So the parts worth examining closely are the request list per client, what the client sees when they log in, and whether an outstanding item is visible without anyone compiling a report. A client book that handles this well removes a genuinely miserable recurring task; one that does not is a directory with a nice interface.
Questions people ask about client management software for accountants
Is practice management software the same thing?
Practice management usually bundles time, billing and workflow around the client record, and is sold per seat to larger firms. Client management is the record itself. Small practices often want the second without paying for the first, which is why the categories are worth separating.
What matters most for an accounting book specifically?
That the client is the entity rather than a person, that the recurring year is held against the client rather than rebuilt annually, and that inbound document requests are visible per client without compiling anything.
Does it need to integrate with the ledger?
Useful, not essential. The client book and the ledger answer different questions, and a clean export plus a shared client identifier solves most of what integration promises, with far less to go wrong at upgrade time.