Your First 90 Days in Business: Tick Off These Finance Must-Haves
By Kevin Sampath · 20 June 2026
Based on a topic we covered on the AccountDads Podcast.
The first 90 days of a business set the tone for everything after. Most owners spend them (rightly) chasing customers — and quietly build a finance mess that costs real money to unwind later. Here’s the checklist we wish every new business owner had, whether you’re starting a construction outfit in Blacktown or a consultancy in the Sydney CBD.
1. Get the structure right before the revenue arrives
Sole trader, company, trust — the structure you pick affects your tax, your risk and how you pay yourself. It’s much cheaper to set up correctly than to restructure later with contracts, employees and BAS history attached. Talk to an accountant before you sign your first big contract, not at your first tax return.
2. Separate the money on day one
One business bank account, one business card. Every dollar in and out of the business flows through them. The moment personal and business spending mix, every future reconciliation, BAS and loan application gets harder — and your visibility of “how is the business actually doing?” disappears.
3. Pick a proper accounting platform (and set it up properly)
Xero, MYOB, QuickBooks — the brand matters less than the setup. A chart of accounts that matches how you actually run the business, bank feeds connected, GST configured correctly, and invoice templates that make you look like the professional outfit you are. A messy setup here is the number-one thing we get called in to clean up.
4. Reconcile weekly, not “eventually”
Fifteen minutes a week keeps your books true: match the bank feed, chase the missing receipts, send the overdue invoice reminders. Leave it three months and it becomes a weekend-eating archaeology project. Businesses that reconcile weekly know their cash position; businesses that don’t, guess.
5. Know your break-even number
The single most useful number in a young business: how much do you need to bill each month to cover everything? Rent, wages, super, insurance, software, your own pay. Write it down. Every pricing decision and every “can we afford this?” conversation gets easier once you know it.
6. Put cash flow on a calendar
Revenue is vanity, cash is survival. BAS due dates, super deadlines, insurance renewals, loan repayments — put them all on one calendar with the amounts. The most common way profitable small businesses die is a tax bill they knew about but didn’t set aside for.
7. Build the reporting habit early
Once a month, look at three things: profit and loss versus last month, who owes you money (and how old the debt is), and cash runway. That’s it — three numbers, one coffee. When you’re ready for dashboards, forecasting and proper management reporting, the habit is already there; the tooling just gets better.
The honest bit
You can do all of this yourself — plenty of owners do. The trap is that these jobs are important but never urgent, so they slip. That’s exactly the gap myrtl fills: we set up the foundations, run the weekly rhythm, and hand you the clear monthly picture — so you can spend your first 90 days (and every day after) building the business, not the bookkeeping.
Starting out in Western Sydney? We work with new and growing businesses across Blacktown, Penrith and greater Sydney. Book a free call and we’ll tell you honestly what you need — and what you don’t yet.