Business services — Compliance
BAS Preparation & Lodgement
Quarterly and monthly BAS preparation and lodgement — GST, PAYG withholding, PAYG instalments, FBT instalments and fuel tax credits — reconciled from your accounting file and lodged through the registered tax agent portal.
- Quarterly BAS
- Monthly BAS
- IAS
- GST
- PAYG
- Xero / MYOB
Eternity Group Accountants provides business advisory and BAS services as a registered tax agent (TPB 25523469). Information on this page is general in nature and does not take into account your specific business circumstances. Engagement scope, fees and deliverables are confirmed in a written engagement letter before work begins.
Scope of work
Reconciled, reviewed and lodged on time.
Every BAS we lodge starts from your accounting file, ends with a written reconciliation, and is filed with the lodgement confirmation for your records.
GST
GST 1A / 1B · capital purchases · adjustments
GST collected and GST paid reconciled against the Xero or MYOB activity report. Capital purchases coded separately. Adjustments and bad-debt write-offs handled where applicable.
PAYG withholding
W1 · W2 · employee summary
Wages, salary and director payments reconciled against payroll summary. Withholding amount checked against PAYG schedules. STP data cross-referenced with BAS labels.
PAYG instalments
T7 / T8 · variation requests
Instalment income and instalment rate reviewed each quarter. Where actual income has materially diverged from the instalment, we prepare a variation request with supporting reconciliation.
FTC, FBT, other
Fuel tax credits · FBT instalments · WET / LCT where applicable
Fuel tax credits for eligible business use. FBT instalments for FBT-registered employers. WET and LCT for relevant industries. Anything that needs to be on the BAS — on the BAS.
Suited to
Businesses we lodge BAS for.
Sole traders and contractors
ABN income with quarterly GST and PAYG instalments. Often combined with the individual tax return so the BAS positions reconcile directly to the year-end return.
Small Pty Ltd companies
Company BAS reconciled against management accounts each quarter, so the year-end company return is not a clean-up exercise.
Family trusts running businesses
Trading trusts with PAYG withholding from staff, GST on supplies and quarterly instalments. Cross-checked against the trustee company where one is in place.
Catch-up and review work
One-off engagements to bring overdue BAS up to date, lodge amendments, or review historical lodgements before an ATO interaction. Priced separately from recurring BAS.
Process
From quarter close to lodgement — typically within two weeks.
A predictable cycle that runs every quarter, so the BAS is never a scramble at the deadline.
Reconciliation
We reconcile your accounting file against bank, payroll and source documents. Anything that does not match is flagged and resolved before drafting the BAS.
Draft & client review
A draft BAS is prepared with a one-page summary: GST position, PAYG withholding, instalments, any variations. You review and confirm before lodgement.
Lodgement & filing
Lodged through the registered tax agent portal. Lodgement confirmation and workpapers filed in your client folder. Payment reminder issued where there is a net BAS payable.
What the review catches
The errors that show up quarter after quarter.
These are the recurring issues we find when reviewing or taking over BAS files. None of them is exotic — they are the ordinary consequences of bank rules, busy quarters and software defaults left unattended.
Before anything is lodged, the draft BAS goes through a final review: each label traced to the reconciled activity report, GST control accounts agreed to the balance sheet, W1 and W2 tied to the payroll summary, and the net position compared against prior quarters so an unusual movement is questioned rather than lodged. Only then does the BAS go to you for confirmation, and to the ATO.
GST coding drift
Bank rules and memorised transactions quietly apply the wrong tax rate — GST claimed on bank fees, government charges or overseas software subscriptions that carry no Australian GST, or missed on transactions that do. A quarter of small errors compounds into a real discrepancy by year end.
Clearing and suspense balances
Payroll clearing, payment gateway clearing and suspense accounts that never quite return to nil. A balance stuck in clearing usually means income or wages are sitting in the wrong period — and the BAS inherits the error.
Fuel tax credit shortcuts
Claims carried forward on last year's rate or an outdated business-use assumption. Rates change during the year and eligibility depends on how the fuel is actually used, so we re-check both rather than rolling the prior claim forward.
Frequently asked questions
BAS preparation — common questions.
Common questions
When are BAS due each quarter?
For most small businesses lodging quarterly, the standard due dates are 28 October (Q1, July–Sept), 28 February (Q2, Oct–Dec, with the holiday extension), 28 April (Q3, Jan–Mar) and 28 July (Q4, Apr–Jun). Lodging through us as a registered tax agent extends each of those dates by four weeks. Monthly lodgers have a 21-day cycle. We confirm your specific cycle in the engagement.
What is included in a BAS preparation engagement?
We reconcile GST collected and GST paid against your Xero or MYOB file, check coding of capital purchases, PAYG withholding from payroll, PAYG instalments, FBT instalments where applicable, and fuel tax credits where applicable. The BAS is reviewed against the source documents, lodged through the registered tax agent portal, and the lodgement confirmation is filed with the workpapers.
I have not been keeping good records — can you still prepare a BAS?
Yes. We can rebuild a BAS from bank statements and source documents, or clean up an existing Xero file before lodgement. A clean-up engagement is priced separately so you see exactly what the catch-up work costs versus the recurring BAS fee. We will not lodge a BAS we cannot reconcile.
What happens if I miss a BAS deadline?
The ATO charges failure-to-lodge penalties and general interest charge on any unpaid GST or PAYG amounts. Penalty remission is sometimes available where there is a reasonable cause and the lodgement is brought up to date promptly. We can prepare a remission request as part of the catch-up engagement — outcomes are at the Commissioner's discretion.
How do you charge for ongoing quarterly BAS?
A fixed quarterly fee based on the business — transaction volume, complexity, number of payroll employees, GST registration status, and whether you carry instalments. We quote in writing after a short scoping call and the fee is locked for the engagement period.
Do you also do the bookkeeping or only the BAS?
Both options are available. Some clients prefer to do their own bookkeeping in Xero and engage us only for quarterly BAS review and lodgement. Others outsource monthly bookkeeping to us so the file is BAS-ready every month. The right choice usually depends on transaction volume and how much in-house finance time you have.
Can you lodge an Instalment Activity Statement (IAS) instead of BAS?
Yes. An IAS applies where you have PAYG withholding or PAYG instalments but no GST registration, or where you lodge GST annually rather than quarterly. The mechanics are the same; we confirm the right form in the engagement.
What documents do you need each quarter?
Read-only access to your Xero or MYOB file, payroll summaries for the period, bank statements for accounts that are not connected to the accounting file, and any unusual transactions you would like flagged. We email a short document checklist about two weeks before each quarter close.
I have several BAS overdue — how does a catch-up work?
We pull your lodgement history from the tax agent portal so we know exactly which periods are outstanding, then prepare the overdue quarters in order — each reconciled to its own bank and payroll data rather than estimated — and lodge them as a batch. Once current, we reconcile the ATO account balance and, where circumstances support it, prepare a penalty remission request. Catch-up work is quoted as a one-off engagement, separate from the recurring quarterly fee.
Should I lodge monthly or quarterly?
Quarterly is the default for most small businesses and usually the right cycle. Monthly GST reporting is compulsory above the ATO turnover threshold, and some businesses in a net refund position choose it voluntarily to bring refunds forward — the trade-off is twelve reconciliation cycles a year instead of four. PAYG withholding can also run on its own monthly IAS cycle while GST stays quarterly. We review the cycle at scoping rather than assuming the existing setting is right.
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Where this fits in the bigger picture
BAS preparation rarely sits in isolation. The company return, forward-looking tax planning, and a virtual-CFO conversation all build on the same reconciled accounting file.
- Tax & Accounting
Company tax return
Quarterly BAS reconciled across the year makes the year-end company return shorter and cheaper.
- Tax & Accounting
Tax planning & strategy
Forward-looking strategy designed alongside the current-year compliance work — instalments, super, structure reviews, pre-30-June actions.
- Business Services
Business advisory & Virtual CFO
Practical advisory cadence built on the same reconciled accounting file — cash flow, structure, decisions, and tax planning rhythm.