Where does a CA firm's time go?
In most small and mid-size CA practices, articles and staff spend a large part of the month on work that adds little professional value: following up with clients for bills and bank statements, typing purchase invoices into Tally, matching the purchase register with GSTR-2B line by line and rebuilding the same MIS in Excel for every client. Deadlines bunch up around the GST and TDS due dates, and that is when errors creep in.
AI is now good enough to read invoices, classify transactions and draft reconciliations, as long as a person reviews exceptions. This guide covers the workflows that matter most for an Indian practice, and how to adopt them without risking client confidentiality.
The 8 highest-value AI use cases for CA firms
| Use case | What it replaces | Rough build effort | Typical tools |
|---|---|---|---|
| 1. Client document collection on WhatsApp | Calls and emails chasing bills every month | 1 to 2 weeks | WhatsApp Business API, Google Drive folders per client, reminder schedule |
| 2. Invoice OCR and data extraction | Typing purchase invoices by hand | 2 to 4 weeks | AI document extraction, validation rules, Sheets or a database |
| 3. Tally import of vouchers | Manual voucher entry | 2 to 4 weeks | TallyPrime Excel or XML import, mapping templates |
| 4. Accounts payable workflow for clients | Paper approvals and missed due dates | 3 to 6 weeks | Email or WhatsApp intake, approval flow, payment schedule, Tally or Zoho Books |
| 5. GSTR-2B vs purchase register reconciliation | Line-by-line Excel matching | 2 to 4 weeks | GSTR-2B Excel or JSON download, Tally purchase register, matching script |
| 6. Bank statement categorisation | Ledger mapping by hand | 2 to 3 weeks | Statement PDFs or Excel, AI classification with client-specific rules |
| 7. Compliance calendar and reminders | Wall calendars and memory | 1 week | Client master, due-date rules, WhatsApp and email |
| 8. Monthly MIS for clients | Rebuilding Excel packs each month | 2 to 4 weeks | Tally exports, Looker Studio or Power BI, PDF mailer |
Accounts payable automation
Accounts payable automation means supplier invoices arrive in one place (a dedicated email address or WhatsApp number), AI extracts supplier, GSTIN, invoice number, date, taxable value, tax and line items, rules check them against the vendor master and purchase orders, the right person approves, the entry goes into Tally and the payment is scheduled before the due date. For a CA firm this can be a service you run for clients, not just an internal tool. Our AI operations and finance service builds this end to end.
Invoice OCR into Tally
Modern AI extraction reads printed and most scanned invoices well, including GST invoices with varied layouts. The weak spots are handwritten bills, poor phone photos and invoices with many line items across pages, so every extraction should carry a confidence check and send doubtful fields to a reviewer. TallyPrime (Release 3.0 and later) can import masters and vouchers from Excel using mapping templates, and has long supported XML import, so extracted data can flow in without retyping. Masters such as ledgers and stock items must exist before vouchers import cleanly, which is why the vendor master is the first thing to clean up.
GSTR-2B reconciliation
GSTR-2B is the static monthly input tax credit statement generated on the GST portal from suppliers' filings, and it can be downloaded in Excel or JSON. Reconciliation compares it with the client's purchase register on GSTIN, invoice number, date, taxable value and tax. A script handles the easy matches, uses fuzzy matching for invoice-number formats (INV/001 vs 001), and produces three lists: matched, mismatched values and missing on either side. Staff then work only on the exceptions and the supplier follow-ups. Use official portal downloads or a licensed GST Suvidha Provider; do not automate logins to the portal with client credentials.
Document collection and MIS
A WhatsApp assistant reminds each client before the cut-off, accepts photos and PDFs, files them into the right client and month folder, and tells staff what is still missing. Monthly MIS packs (sales, purchases, margins, receivables ageing, cash position) can be generated from Tally exports into a dashboard or PDF, which turns a compliance client into an advisory one. See our guide to automating MIS reports and what a Power BI dashboard costs.
How should reconciliation exceptions be sorted?
| Exception type | Typical cause | Who acts |
|---|---|---|
| In books, missing in GSTR-2B | Supplier has not filed or filed late, or used a wrong GSTIN | Staff follow up with the supplier; credit is reviewed before claiming |
| In GSTR-2B, missing in books | Bill not received or not entered, or a supplier error | Client is asked for the bill; possible missed expense |
| Amount mismatch | Rounding, partial credit notes, typing errors | Small differences auto-tagged; larger ones reviewed |
| Invoice number mismatch | Prefixes, slashes, financial-year suffixes | Fuzzy match proposes a pair; staff confirm once, rule remembers |
| Date or period mismatch | Invoice booked in a different month | Timing difference noted for the next period |
Store each confirmed match rule per supplier, so the second month is faster than the first and the fourth month needs little attention. Keep the reconciliation output as a sheet the client can see, with a status column, because most open items need the client or supplier to act. Our comparison of n8n, Make and Zapier helps if you are choosing the automation layer that runs these jobs on a schedule.
What does each use case typically save?
Typical ranges with the reasoning. Savings scale with client count and invoice volume, so measure hours per client per month before you start.
| Use case | Typical saving | Why |
|---|---|---|
| Document collection | Hours of follow-up per staff member each month | Reminders and filing are automatic; staff see only what is missing |
| Invoice OCR plus Tally import | Most of the manual typing time on purchase entries | A reviewer checks flagged fields instead of entering every field |
| AP workflow | Fewer missed due dates and duplicate payments | Every invoice has an owner, an approval and a scheduled date |
| GSTR-2B reconciliation | Days of matching per busy month, firm-wide | Exact and fuzzy matches are automatic; only exceptions need people |
| Bank categorisation | Much of the ledger-mapping time | Recurring narrations map the same way every month once rules are set |
| Client MIS | Hours per client per month | The pack is generated from the same template each month |
A 30-60-90 day rollout plan
- Days 1 to 30. Compliance calendar and WhatsApp document collection for all clients; clean vendor and ledger masters for five pilot clients.
- Days 31 to 60. Invoice extraction and Tally import for the pilot clients, with a reviewer queue. GSTR-2B reconciliation script on the same clients, run in parallel with the manual method.
- Days 61 to 90. Extend to more clients, add bank categorisation and the first client MIS dashboards, and offer AP automation as a paid service to clients who want it.
Compliance and confidentiality notes
Client confidentiality. Chartered accountants have a professional duty of confidentiality under ICAI's Code of Ethics. Put that duty into the design: client documents stay in storage the firm controls, AI providers are used on business plans that do not train on your data, access is per staff member and every change is logged. Tell clients in your engagement letter that you use automated tools.
Data protection. Client invoices and bank statements contain personal data of individuals, such as proprietors and employees, which the DPDP Act, 2023 covers. The DPDP Rules notified in November 2025 phase in obligations such as security safeguards and breach reporting over 18 months.
Professional responsibility. The CA remains responsible for every return, audit report and certificate. AI prepares and flags; a qualified person reviews and signs. Keep the source document attached to every voucher so an audit trail survives.
What should a CA firm NOT automate?
- Sign-offs, certifications and filing submissions. These stay with the CA.
- Tax positions and advice to clients. AI can draft research notes, the partner decides.
- Logins to government portals with client passwords through unofficial scripts.
- Posting entries with low-confidence extraction without review.
- Responses to notices from tax authorities. Draft with help, review in full.
How Silvane can help
Silvane builds document collection, invoice-to-Tally pipelines, GSTR-2B reconciliation and client MIS through our AI operations and finance and workflow automation services, inside the firm's own accounts. A firm starting with document collection and one reconciliation workflow fits a Starter build from ₹50,000 plus a run plan from ₹15,000 a month; firm-wide AP and Tally automation usually fits Growth from ₹1,20,000. Usage is billed at cost and GST is extra. The ₹199 founding-member audit is credited to the build.
Sources: Tally Solutions: importing data into TallyPrime · Tally Solutions: what is GSTR-2B · ICAI · MeitY: DPDP Act and Rules