BAS preparation software is a purpose-built tool that automates the steps between raw bank transactions and a lodgement-ready Business Activity Statement — including GST coding, bank reconciliation, and BAS worksheet generation — across every client in a practice simultaneously. Rather than treating BAS preparation as a once-per-quarter data entry sprint, dedicated BAS software makes it a continuous, automated process that runs throughout the quarter so the bookkeeper arrives at lodgement time with work that is already 85–90% complete.
For Australian bookkeeping practices and chartered accounting firms managing multiple clients, this distinction matters enormously. The BAS lodgement cycle is not optional, and the penalties for late lodgement or incorrect GST reporting accumulate quickly. Purpose-built BAS software removes the manual bottlenecks that cause both.
What is BAS preparation software?
BAS preparation software connects to your clients' bank feeds, applies GST codes to each transaction throughout the quarter, reconciles the bank account against the accounting ledger, and produces a completed BAS worksheet — ready for the bookkeeper's review and sign-off before lodgement.
In the Australian context, every transaction a business client processes carries a GST implication. Whether a purchase is taxable (GST), GST-free (FRE), input-taxed (INP), or not reportable (N-T) determines how it flows into the G labels on the BAS worksheet — particularly G1 (total sales), G10 (capital acquisitions), G11 (non-capital acquisitions), 1A (GST on sales), and 1B (GST on purchases). A single miscoded transaction can create a GST discrepancy that triggers an ATO audit or requires an amendment.
Dedicated BAS software handles this coding automatically, at the transaction level, so that by the time BAS preparation begins each quarter the underlying data is already coded, reconciled, and ready to flow into the worksheet.
To understand the reconciliation component that underpins BAS preparation, see What is bank reconciliation? A guide for Australian bookkeepers.
What good BAS software does: 5 core capabilities
Not all BAS software is equivalent. The capabilities that separate purpose-built BAS tools from general accounting platforms come down to how they handle five specific tasks.
1. Auto-code GST transactions throughout the quarter — not just at BAS time
The defining characteristic of effective BAS software is that GST coding happens continuously, not in a quarterly scramble. Every transaction that arrives from the bank feed is coded immediately against the practice's rule library and the client's coding history. When BAS preparation begins, the bookkeeper is reviewing exceptions — not entering codes for the first time.
This matters because the volume of transactions that needs to be coded at BAS time is irreducible; the only variable is who does the work and when. Software that codes continuously converts that work from a high-pressure quarterly event into a steady, automated background process.
2. Reconcile bank accounts per client before BAS is lodged
A BAS lodged against an unreconciled bank account is a significant compliance risk. If unmatched transactions are sitting in the ledger — duplicates, missing items, bank errors — the GST figures reported on the BAS may not match the business's actual transaction record. The ATO can request supporting documentation for any lodgement, and an unreconciled ledger does not support a clean defence.
Good BAS software enforces reconciliation as a prerequisite for BAS preparation. The workflow is sequential: bank feed first, reconciliation second, BAS worksheet third. Lodgement should not be possible until the bank account balance matches the reconciled ledger balance.
3. Generate BAS worksheets directly from reconciled data
Once the bank account is reconciled and all transactions are coded, the BAS worksheet — covering G1 through G19 and the 1A/1B tax withheld fields — should be generated automatically from the coded transaction data. Manually re-keying figures from a ledger into a BAS worksheet is a double-handling step that introduces transcription errors and consumes time with no value added.
Purpose-built BAS software maps coded transactions to BAS labels in real time. The worksheet is the ledger, not a separate document.
4. Flag GST coding errors before they become ATO problems
Automated coding is only valuable if the software can identify when its own confidence is low and surface those transactions for human review. Effective BAS software maintains confidence scores on automated coding decisions and routes low-confidence items — new vendors, unusual transaction amounts, inconsistent coding history — into a review queue before the BAS worksheet is generated.
This is fundamentally different from alerting the bookkeeper after the BAS has been prepared. Catching coding errors upstream, at the transaction level, means the BAS worksheet is clean when it is generated. Catching them after the worksheet is produced means reconciling two datasets: the BAS figures and the corrected ledger.
5. Work across multiple clients from a single dashboard
For a practice managing 10, 20, or 50 clients, the operational overhead of switching between client files to check BAS preparation status is not trivial. Each context switch adds time and introduces the risk of missing a client whose BAS deadline falls in a busy period.
Good BAS software provides a practice-level dashboard that shows, for each client: bank feed connection status, percentage of transactions coded, number of items in the review queue, bank reconciliation status, and whether the BAS worksheet is ready to review. The bookkeeper works from the dashboard, not from a mental checklist.
How Reconlink handles BAS preparation
Reconlink automates BAS preparation through a four-step workflow that runs from initial bank feed connection through to a lodgement-ready BAS worksheet.
Step 1: Bank feed connection
Reconlink connects to each client's bank account via the Consumer Data Right (CDR) network using the Basiq integration. Once a client authorises their bank, transactions flow directly into Reconlink in real time — no CSV exports, no statement imports, no manual uploads. CDR coverage includes the major Australian banks, with additional institutions connecting as they fulfil their CDR obligations.
For banks not yet covered by CDR, Reconlink accepts statement imports in CSV and Excel formats.
Step 2: Automated coding via three-layer AI
Every transaction that arrives from the bank feed passes through Reconlink's three-layer AI architecture before it reaches the bookkeeper's queue.
The first layer applies the practice's deterministic coding rules. For transactions that match a known pattern — regular vendors, payroll providers, ATO direct debits, utility suppliers — the account code and GST code are assigned instantly with zero error rate. A mature rule library typically handles 50–70% of transaction volume at this layer.
The second layer applies a per-client machine learning model trained on the client's own coding history. For transactions that do not match a saved rule, the ML model predicts the correct codes based on how similar transactions have been coded in previous periods. Each prediction carries a confidence score; transactions above the practice-set confidence threshold are auto-committed, while transactions below it are routed to the review queue.
The third layer applies a large language model (LLM) to transactions that the rule engine and ML model cannot confidently classify. The LLM interprets ambiguous bank descriptions using broad knowledge of business operations — identifying payment processors, insurance providers, subscription services, and other vendor types from their bank description alone.
In a mature Reconlink configuration, fewer than 15% of transactions require LLM processing. The architecture becomes more efficient with each reconciliation cycle as the rule library and ML models grow.
For more on Reconlink's multi-layer AI approach, see the BAS preparation checklist for accounting practices.
Step 3: Exception review
After automated coding, the bookkeeper reviews only the transactions in the exception queue — items below the confidence threshold, items flagged for unusual amounts or vendor patterns, and any items the system could not classify. The review interface shows the bank description, the AI's suggested codes, the confidence score, and the client's coding history for similar transactions.
The bookkeeper confirms, overrides, or re-codes each exception. Confirmed codings are fed back into the ML model, so the system learns from each review cycle and the exception queue shrinks over time.
Step 4: BAS worksheet export
Once the bank account is reconciled and all transactions are coded — including reviewed exceptions — Reconlink generates the BAS worksheet directly from the coded ledger. The worksheet maps transaction data to the relevant G labels (G1–G19) and calculates the 1A and 1B amounts automatically.
The generated worksheet is reviewed by the bookkeeper or BAS agent before lodgement. Reconlink maintains a full transaction-level audit trail, including the coding source (rule, ML model, LLM, or manual override) and the confidence score for each automated decision. This audit trail is available for any ATO review or internal compliance check.
After lodgement, the period is locked to prevent back-dated changes to the reconciled data.
Who Reconlink is built for
Reconlink is designed for bookkeeping practices and chartered accounting firms that manage ongoing BAS compliance work for multiple business clients. The productivity gains compound as client volume increases.
- Bookkeeping practices managing 5 or more clients where cross-client visibility and shared rule libraries reduce per-client preparation time with each additional period
- Registered BAS agents who need an auditable, ATO-compliant coding and reconciliation workflow that supports their sign-off obligations
- CA firms with bookkeeping or compliance divisions that process BAS for a client portfolio alongside broader accounting engagements
- Growing practices that need to take on additional clients without increasing headcount proportionally
Reconlink is not designed for sole traders or small business owners managing their own BAS. General-purpose accounting platforms with basic bank rule features are likely sufficient for single-entity use. Reconlink's value is in multi-client workflows where the practice-level dashboard, shared rule library, and per-client ML models generate compounding returns.
Feature comparison: Reconlink vs. manual BAS preparation
| Manual / spreadsheet process | Reconlink | |
|---|---|---|
| GST coding | Bookkeeper codes each transaction at BAS time | AI codes 85–92% of transactions continuously; bookkeeper reviews exceptions |
| Bank feed import | CSV download and manual import per client | Direct CDR bank feed, no manual steps |
| Reconciliation | Manual matching against bank statement | Automated matching; unreconciled items flagged before BAS worksheet is generated |
| BAS worksheet | Manually keyed from the ledger into a separate document | Generated directly from coded, reconciled transaction data |
| Error detection | Bookkeeper catches errors on review, or after lodgement | Low-confidence codings flagged in exception queue before the worksheet is generated |
| Client visibility | Switch between files to check preparation status | Single practice dashboard: coding status, reconciliation status, and BAS readiness per client |
| Audit trail | Manual documentation or none | Full transaction-level audit log with coding source and confidence score |
| Period locking | Manual discipline required | Automated period lock prevents back-dated changes after lodgement |
| BAS preparation time | 2–6 hours per client per quarter | 30–60 minutes per client per quarter (internal benchmark, Jan–Apr 2026) |
Pricing
Reconlink is priced per practice, based on the number of active clients under management. All plans include full access to the three-layer AI coding engine, CDR bank feed integration, BAS worksheet generation, and the practice-level dashboard.
| Plan | Monthly price | Clients included |
|---|---|---|
| Starter | $89/month | Up to 10 clients |
| Growth | $229/month | Up to 30 clients |
| Scale | $549/month | Up to 100 clients |
A free trial is available for practices that want to test the automated coding engine against their own client data before subscribing. See the full pricing details for what is included in each plan.
Frequently asked questions
What is BAS preparation software and how does it work? BAS preparation software automates the steps between raw bank transactions and a completed, lodgement-ready BAS worksheet. It connects to clients' bank feeds, assigns GST codes to each transaction throughout the quarter, reconciles the bank account against the accounting ledger, and generates the BAS worksheet — covering G1 through G19 and the 1A/1B fields — directly from the coded data. Reconlink uses a three-layer AI architecture to automate the majority of coding decisions, with a review queue for low-confidence or novel transactions.
Is Reconlink registered with the ATO or compliant with BAS agent obligations? Reconlink is designed to support registered BAS agents and bookkeepers in meeting their ATO compliance obligations. It applies ATO-specific GST codes (GST, FRE, INP, N-T, CAP), generates BAS worksheets from reconciled data, and maintains a full transaction-level audit trail. The sign-off and lodgement remain the registered BAS agent's responsibility — Reconlink handles the automated preparation workflow that precedes it. Practices should confirm their specific obligations with the Tax Practitioners Board.
Can Reconlink connect to all Australian banks? Reconlink connects to Australian bank accounts via the Consumer Data Right (CDR) network using the Basiq integration, which covers the major Australian banks including the big four. For banks not yet on CDR, Reconlink accepts statement imports in CSV and Excel formats. CDR coverage continues to expand as additional institutions fulfil their obligations under the Consumer Data Right Act 2022.
How is Reconlink different from using Xero or MYOB for BAS preparation? Xero and MYOB are general-purpose accounting platforms designed primarily for business owners managing their own accounts. Reconlink is purpose-built for practices managing multiple clients. The key differences are: a practice-level dashboard showing BAS preparation status across all clients simultaneously, per-client ML models trained on each client's coding history, a shared practice-level rule library, continuous coding throughout the quarter rather than a quarterly data-entry sprint, and a reconciliation-first workflow that enforces bank reconciliation before the BAS worksheet is generated.
What happens if the AI codes a transaction incorrectly? All automated coding decisions carry a confidence score. Transactions below the practice-set confidence threshold are routed to the exception queue for bookkeeper review before the BAS worksheet is generated. When a bookkeeper overrides an incorrect suggestion, the correction is fed back into the per-client ML model, reducing the likelihood of the same error in subsequent periods. The full coding history — including the source of each decision and any manual overrides — is retained in the audit trail.
How long does it take to set up Reconlink for a practice? Most practices complete initial onboarding — connecting CDR bank feeds for existing clients, importing coding history, and configuring the practice-level rule library — in a single session. The AI models begin learning from the first period's codings and improve with each subsequent reconciliation and BAS preparation cycle. Practices typically see the exception queue size fall noticeably by the second or third period as the ML models build confidence on each client's transaction patterns.
Does Reconlink handle PAYG withholding and other BAS labels beyond GST? The current Reconlink workflow focuses on the GST reconciliation and coding steps that feed the GST-related BAS labels (G1–G19, 1A, 1B). PAYG withholding figures (W1, W2) are entered by the bookkeeper into the BAS worksheet. Reconlink's development roadmap includes additional BAS label automation, and the practice dashboard is designed to accommodate these fields as they are released.
Ready to spend less time preparing BAS and more time advising clients?
Reconlink automates the GST coding, bank reconciliation, and BAS worksheet generation that currently consumes hours of bookkeeper time each quarter. Connect your clients' CDR bank feeds, let the three-layer AI handle the bulk of transaction coding, and arrive at BAS time with work that is already done — leaving your team to review, not enter.
Book a free demo — see Reconlink work against your actual client data, with no commitment required.
This page was last reviewed on 23 May 2026. ATO BAS lodgement requirements, GST codes, and CDR bank coverage evolve — confirm current obligations at ato.gov.au. This is general guidance, not specific tax or legal advice.