How to Write a Simple Business Plan (That You Will Actually Use)
Most business plans get written once, admired briefly, and never opened again. That's not because planning is a waste of time — it's because a 40-page document written to impress an imaginary reader is a waste of time. This guide walks you through a lean, one-page-first plan that answers the questions that actually decide whether your business survives.
Why one page beats forty
Unless you're chasing bank finance, investors or a grant, nobody is going to read your business plan except you. So write it for you. A one-page plan you review every month will do more for your business than a polished document gathering dust in a drawer.
The one-page approach forces you to be honest. You can't hide a shaky idea behind ten pages of industry analysis when the whole plan has to fit on a single sheet. If you can't explain who your customer is and why your numbers stack up in a paragraph each, more pages won't fix that.
There is a second benefit: a short plan is easy to update. Prices change, a competitor opens up the road, your best-selling service turns out to be the one you almost did not offer. A living one-pager absorbs those lessons. A 40-page tome doesn't.
The sections your plan actually needs
Work through these nine sections in order. Aim for a few sentences or a small table for each — if a section is ballooning, you're drifting into essay-writing territory.
1. The problem and your offer
One or two sentences: what problem do people have, and what do you sell that fixes it? "Time-poor dog owners in the outer suburbs can't get to a salon during business hours; I bring the grooming salon to their driveway." If you can't write this sentence, stop here and figure it out — everything else hangs off it.
2. Your target customer
"Everyone" isn't a target market. Get specific: who are they, where are they, what do they currently do instead of buying from you, and roughly how many of them are within your reach? A mobile groomer serving three postcodes has a very different plan from one covering half of Brisbane.
3. The competition
List your three or four closest competitors — including the do-nothing option and the DIY option, which are usually your biggest rivals. For each one, note what they charge and why a customer would pick you instead. If your only answer is "I'll be cheaper", be careful: competing on price alone is a hard road for a small operator.
4. Pricing and unit economics
This is the section most first-time owners skip, and it's the one that matters most. For each product or service, work out:
- Price — what the customer pays
- Variable costs — what it directly costs you to deliver one unit (materials, consumables, fuel, card fees)
- Gross margin — price minus variable costs
That gross margin is what's left to pay your fixed costs and, eventually, you. If it's thin, no amount of volume will save you — you'll just be busy and broke. See our guide on cash flow management for why margin and cash are not the same thing.
One trap to plan for early: once your turnover hits $75,000 (as at August 2026) you must register for GST, which affects your pricing and paperwork. Our plain-English BAS and GST guide covers what that means in practice.
5. Startup costs
List everything you need to spend before you open the doors: equipment, vehicle, fit-out, initial stock, insurance, licences, website, and registration fees. Then add a working capital buffer — enough to cover a few months of fixed costs while revenue ramps up. Running out of cash in month three is one of the most common and most avoidable ways new businesses die.
6. Break-even
Break-even is the number of sales per month where you stop losing money:
Break-even units = monthly fixed costs ÷ gross margin per unit
Then do the version that actually matters: add the wage you need to live on to your fixed costs and recalculate. That second number — the sales needed to cover the business and pay you — is the real test of whether the idea works. Sanity-check it: is that many customers per week physically possible, and plausible in your market?
7. A 12-month financial forecast
Nothing fancy — a simple month-by-month spreadsheet with three rows: expected sales, expected costs, and the running cash balance. Be pessimistic on revenue (month one will be slower than you hope) and realistic on costs. If you'll employ staff, remember wages carry on-costs: super guarantee is 12% of ordinary time earnings (as at August 2026), plus workers compensation insurance and possibly payroll tax down the track.
Once you're trading, decent accounting software will track actuals against this forecast for you, which is where a plan stops being a document and starts being a management tool.
8. Marketing plan
Not a strategy deck — a short list of the two or three channels you will actually use, what each costs, and what you expect from it. For most local service businesses that starts with a free Google Business Profile, a simple website, and asking every happy customer for a review. Commit to a monthly marketing budget in dollars and hours, and write it into your fixed costs.
9. Milestones
Four to six dated, measurable goals for the first year: "registered and insured by October", "first 20 paying customers by December", "break-even month by April", "hire first casual by June". Vague goals ("grow the business") produce vague effort. While you're setting these up, sort your structure early too — see choosing between sole trader, company and trust — because changing later is doable but messy.
Worked example: Muddy Paws Mobile Dog Grooming
Here is what the numbers half of a one-page plan looks like for a fictional mobile dog groomer starting as a sole trader. The figures are illustrative — yours will differ.
| Item | Figure |
|---|---|
| Average price per groom | $110 |
| Variable cost per groom (consumables, fuel, card fees) | $20 |
| Gross margin per groom | $90 |
| Fixed costs per month (van finance, insurance, phone, software, marketing) | $1,800 |
| Break-even | 20 grooms/month (about 5 a week) |
| Owner's target drawings | $5,000/month |
| Real target | 76 grooms/month (about 18 a week) |
Startup costs: second-hand van $22,000, grooming fit-out $12,000, tools and equipment $2,500, van wrap and branding $2,000, insurance and registrations $1,500, website and booking software $800, working capital buffer $5,000 — roughly $45,800 before the first customer.
Notice what this one table tells you instantly. Break-even at five grooms a week sounds easy — but paying yourself a modest wage means eighteen grooms a week, every week. Is that achievable in the target suburbs at $110 a groom? That single question is worth more than 40 pages of padding, and it's exactly the kind of question a lean plan forces you to answer before you spend $45,000 on a van.
If the answer is no, you adjust the plan, not the dream: raise the price for double coats and large breeds, tighten the service area to cut fuel and travel time, or add a second revenue line like nail-trim express visits between full grooms. Cheap decisions on paper, expensive ones in real life.
When you actually need the fuller plan
There are three situations where the lean one-pager won't cut it:
- Bank finance. Lenders want a formal plan with detailed financial projections, evidence of demand, and your own financial position.
- Investors. Anyone putting equity in will expect a fuller document plus a pitch deck and detailed financials.
- Grants. Government grant applications usually require a structured business plan as part of the paperwork.
Even then, start with the one-pager. A full plan built on top of clear thinking is quick to expand; a full plan written from scratch to impress a bank tends to be padding wrapped around confusion.
You don't need to pay for templates in any case. business.gov.au publishes free templates for both — a lean one-page plan and a detailed version designed for funding applications — and they are perfectly good.
Keep it alive
The plan only pays off if you revisit it. Put a monthly 30-minute review in your calendar: compare actual sales and costs against the forecast, tick off or push back milestones, and change anything that reality has proven wrong. A plan that gets corrected monthly becomes a genuinely useful map of your business. One that never changes is just a souvenir of what you believed on day one.
Key takeaways
- Unless you need finance, a one-page plan you review monthly beats a 40-page document you never open.
- The make-or-break sections are the numbers: unit economics, startup costs, break-even and a 12-month forecast.
- Calculate break-even twice — once to cover costs, and again including the wage you need to live on. The second number is the real test.
- Include a working capital buffer in your startup costs; running dry in month three is avoidable.
- Use the free lean and detailed templates on business.gov.au rather than paying for one.
- A plan is a working tool, not a document — update it every month against your actuals.
Where to get help
- business.gov.au — develop your business plan — free lean and detailed templates, plus guides for new starters.
- ato.gov.au — current GST registration, super guarantee and tax obligations.
- asic.gov.au — business name registration and company obligations, with current fees.
- Your accountant — an hour spent stress-testing your forecast and structure before you launch is the cheapest reality check you'll ever get.
General information only. This guide doesn't take your personal or business circumstances into account and isn't financial, legal or tax advice. Rates and thresholds change — confirm current figures with ato.gov.au or your accountant before acting.