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Free tool · Australia

13-week cash flow forecast builder

Enter eight simple assumptions: opening cash, sales, expenses, receivables, payables and your collection and payment days. Get an instant 13-week cash flow forecast, your lowest cash week and a CSV download.

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The short answer

A 13-week cash flow forecast projects weekly cash receipts and payments for the next quarter, showing your lowest cash point and when it occurs. It's the core tool for managing short-term liquidity. In Australia it should include fortnightly wages, Payday Super with each pay run, BAS and PAYG instalments, and loan repayments.

Interactive

13-Week Cash Flow Forecast Template

13-week cash flow builderEdit any cell · download CSV

Enter eight assumptions. The forecast builds itself.

How it works: sales are collected after your average collection days and expenses are paid after your average payable days. Opening receivables and payables are collected and paid evenly over those same periods. Figures in AUD, weekly.

Method

How it works and how to use the result

Enter your opening cash balance, expected monthly sales and expenses, today's receivables and payables, and your average collection and payment days. The tool spreads monthly figures into weeks, collects sales after your collection days and pays expenses after your payment days, and collects and pays opening balances evenly over those periods. Change one assumption, such as collection days, and you see the cash impact instantly.

It's deliberately simple. A full CFO forecast adds GST and BAS, PAYG, Payday Super, payroll tax, loan repayments and one-off items. CFOAvatar builds that automatically from your accounting software.

FAQs

Frequently asked questions

Why 13 weeks?

It covers a full quarter, including a BAS cycle, while staying short enough to forecast accurately week by week.

What are average collection days?

Also called debtor days or DSO: on average, how many days after invoicing your customers pay. Your accounting software's aged receivables report shows it, or divide receivables by annual sales and multiply by 365.

What are average payable days?

Also called creditor days or DPO: how many days after receiving a bill you pay your suppliers. Divide payables by annual expenses and multiply by 365.

Can I download the forecast?

Yes. Click 'Download as CSV' to open it in Excel or Google Sheets.

Last updated 15 October 2026 · Uses Australian rates and rules published at that date. Estimates only; not financial or tax advice.

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