Most tradies lose money not because they don't do the work — but because their paperwork doesn't keep up. A quote goes out and never gets followed up. Work gets done but the invoice takes a week to land. Payments come in but never get recorded properly. Come BAS time, it's anyone's guess what the numbers look like.

The fix isn't more admin — it's a consistent workflow. Quote before you start. Invoice when you finish. Record every payment. Pull the BAS report from the same place. This guide walks through exactly that, using a real job scenario in TradesBill.

The scenario: Dave's switchboard upgrade job

Dave Chen runs DC Electrical out of Blacktown, NSW. He's got his contractor licence, a ute, and a regular client — Greenfield Properties Pty Ltd — who owns a portfolio of rental properties across Western Sydney.

Greenfield calls Dave about a switchboard upgrade at one of their Penrith properties. Old ceramic fuses, no RCDs, definitely not compliant. Dave needs to quote, do the work, get paid, and have it all recorded cleanly before the end of the quarter.

The job breakdown:

Item Qty Unit Price Total
Switchboard replacement — Clipsal 40-way1$1,650$1,650
Circuit breakers & RCDs (x12)12$85$1,020
Labour — licensed electrician (8hrs)8$145$1,160
Travel & waste disposal fee1$120$120
Subtotal (ex. GST) $3,950.00
GST (10%) $395.00
TOTAL (inc. GST) $4,345.00

Dave requires a 50% deposit ($2,172.50) before ordering materials, with the balance due 14 days after completion.

Step 1: Send a Quote before starting work

A Quote protects both Dave and Greenfield. If the scope changes — they find knob-and-tube wiring behind the wall, or want an extra circuit added — the quote is the baseline they negotiate from. Without it, price disagreements happen after the work is done, which is the worst possible time.

In TradesBill, Dave creates a new document and sets the type to Quote. He adds his four line items, sets a 14-day expiry, and sends the PDF link to the property manager. The quote clearly shows the subtotal, 10% GST, and total — everything Greenfield needs to approve the spend internally.

Creating a Quote in TradesBill for a switchboard upgrade job
Creating a Quote in TradesBill for a switchboard upgrade job.

Tip: Always label it "Quote" not "Invoice" before work starts. The ATO distinguishes between them — a Tax Invoice triggers a GST obligation, while a Quote is just an offer to supply. Getting the label right avoids confusion on both sides.

Greenfield approves the quote the same day. Dave books the job for the following Tuesday and orders the Clipsal board and RCDs from his electrical wholesaler.

Step 2: Convert to a Tax Invoice when the work is done

The switchboard upgrade takes Dave and his apprentice the full day. By 4:30pm the board is live, the RCDs are tested, and the compliance certificate is signed. Now it's invoice time.

In TradesBill, Dave opens the saved quote and changes the type from Quote to Tax Invoice. The line items, amounts, and dates carry over — he doesn't retype anything. He hits Save, and the document is now a valid ATO-compliant Tax Invoice with his ABN, the correct "Tax Invoice" label, and a GST breakdown.

Tax Invoice saved and ready to send — total $4,345.00 inc. GST
Tax Invoice saved and ready to send — total $4,345.00 inc. GST.

The invoice status is Draft at this point. Dave marks it as Sent after he emails the PDF to Greenfield's accounts team. This matters — TradesBill uses the Sent status to calculate overdue invoices, so if the payment doesn't arrive by the due date, it'll show up as Overdue automatically.

Step 3: Record the deposit and the final payment

Three days later, Greenfield's accounts team transfers the 50% deposit — $2,172.50 via bank transfer. Dave opens the invoice and clicks Record Payment. He enters the amount, selects EFT, adds the bank reference number from the transaction confirmation, and saves.

The invoice status changes from Sent to Partial. This tells Dave — and the system — that money has come in but the job isn't fully settled yet. The outstanding balance ($2,172.50) is tracked automatically.

Recording a payment against the invoice — amount, method and date
Recording a payment against the invoice — amount, method and date.

Two weeks later the final payment arrives. Dave records it the same way — $2,172.50, EFT, with the reference. Status flips to Paid. The job is closed.

Why recording payments matters for BAS: TradesBill calculates your GST on sales (1A) using paid invoices only — the cash accounting method the ATO allows for businesses under $10 million. If you don't mark invoices as paid, your 1A figure will be wrong.

Step 4: Pull the BAS Tax Summary at quarter end PRO

At the end of the quarter, Dave opens TradesBill's BAS Tax Summary — a PRO feature available from $9/month. It automatically calculates two numbers he needs for his Business Activity Statement:

For Dave's switchboard job, the contribution to his quarterly figures is: G1 includes $4,345.00, and 1A includes $395.00 of GST collected (since the invoice is fully paid).

BAS Tax Summary — G1 total sales and 1A GST collected for the quarter
BAS Tax Summary — G1 total sales and 1A GST collected for the quarter.

Dave copies these figures into his myGov business portal to lodge his BAS. His accountant verifies the numbers before lodgement — but because Dave's been recording everything in TradesBill through the quarter, there are no surprises.

Tips for keeping your invoicing workflow tight

The workflow in summary

Four steps, every job, no exceptions:

  1. Quote — before work starts, with all line items and your payment terms.
  2. Tax Invoice — when work is complete. Change the type, save, send.
  3. Record payments — deposit when it arrives, final when it clears.
  4. BAS Summary — pull the G1 and 1A figures at quarter end. Done. PRO

Stick to this and you'll never chase a payment that was already paid, never be surprised by a BAS bill, and never have to reconstruct a quarter's worth of invoices from memory.

Start the workflow today — free

Steps 1–3 (quotes, invoices, payments) are completely free — no credit card, no time limit. The BAS Tax Summary is available on the Pro plan from $9/month.

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