No.
You don't need a CRM.
Why
You have five ongoing clients and fewer than ten new inquiries per month, all coming through one channel — WhatsApp. That's not a pipeline; that's a contact list with deadlines. The risk in accountancy at your stage isn't losing leads — it's losing track of filing dates, document requests, and which client still hasn't sent you their bank statements.
What you actually need
- WhatsApp Business app (free) — port your number, then create labels: "New inquiry", "Docs pending", "In progress", "Filed". Every chat gets one label.
- Google Sheets (free) — one sheet called "Clients & Deadlines 2026" with columns: Client, Service, Next Deadline, Docs Status, Last Contact, Fee. Five rows for clients, one row per new inquiry.
- A habit — the Monday 20-minute sweep — every Monday morning, open WhatsApp labels and the sheet, message anyone in "Docs pending" who's been there over a week, and check next week's deadlines.
Do this today
Install WhatsApp Business, go to Settings → Business tools → Labels, and create the four labels above. Then scroll through your existing chats and tag every active client thread and any open inquiry. By tonight you'll see at a glance who owes you documents and who you owe a reply.
What to ignore
Skip Zoho Books CRM bundles, HubSpot Free, and any "CRM for accountants" pitch you see on LinkedIn — at five clients, the setup time alone costs more than the leads you'd save. Practice-management suites like Karbon or TaxDome are built for 30+ client books; revisit them when you're there, not now.
What doing nothing costs you
At under ten inquiries a month through one channel, the real cost isn't lost leads — it's one missed filing deadline or GST return that costs a client a penalty and costs you the client.
When to revisit this
When you cross 15 active clients or hire someone to help with bookkeeping.