Subscriptions make cash flow more predictable because revenue repeats each month, but they change its timing. Switching from upfront or project fees to monthly plans usually causes a temporary cash dip while the subscriber base builds. Annual plans bring cash in early, yet the revenue, and often the GST, belong to the year ahead. Forecast cash from your MRR, billing dates and costs.
Key takeaways
- Moving clients from big one-off fees to monthly plans can take many months to get back to the old monthly cash level.
- Annual prepayments are cash today, but a liability until you deliver. Don't spend them as profit.
- Set aside one-eleventh of every receipt for GST, and watch PAYG instalments as profit rises.
- Failed card payments are a silent cash leak. Track and recover them every month.
- Forecast cash from your MRR movements and billing calendar, not from last year's bank balance.
A friend of mine runs a financial services law firm.
He told me his clients would rather pay $3,000 a month for ongoing access to his advice than $30,000 upfront. I put that story in the introduction to The Subscription Playbook, because it captures why subscriptions win. The monthly fee ends up being a lot more money over the long run, and the clients are happier.
But think about what that switch does to the firm's bank account in month one.
Instead of $30,000, it gets $3,000.
That's the part of subscriptions nobody puts on a slide. Recurring revenue is the cure for the feast-and-famine cycle I lived through in my agency. It's also, for a while, a cash flow problem of its own.
This guide is the accountant's view of subscription cash flow: what changes, what to watch, and how to forecast it. It's general information as at October 2026, with Australian tax examples, not financial or tax advice.
Why are subscriptions good for cash flow?
In Chapter 1 of the book I quote the US Bureau of Labor Statistics: about half of all businesses close within five years, and the top reason is low sales and bad cash flow.
Subscriptions attack both.
- Predictability. You start each month knowing most of your revenue. You can hire, plan stock and commit to rent with more confidence.
- Smoother collection. Automatic billing replaces chasing invoices.
- Compounding. Each month's new subscribers add to the base instead of replacing last month's projects.
Your MRR becomes the heartbeat of the business. Once it covers your fixed costs, you're playing with house money.
But getting there takes planning.
The switching dip: why cash falls before it rises
When a business moves from upfront or project fees to monthly plans, cash usually dips first. I call it the switching dip. Here's what it looks like with real numbers.
An agency switching to monthly plans (illustrative)
Today the agency wins 10 new clients a month, each paying A$6,000 for a project. That's A$60,000 a month of new cash.
It decides to sell a A$600-a-month retainer instead (A$7,200 a year, 20% more per client). It still wins 10 new clients a month, and for simplicity, nobody cancels.
| Month | Monthly cash: projects | Monthly cash: retainers | Cumulative: projects | Cumulative: retainers |
|---|---|---|---|---|
| 1 | A$60,000 | A$6,000 | A$60,000 | A$6,000 |
| 3 | A$60,000 | A$18,000 | A$180,000 | A$36,000 |
| 6 | A$60,000 | A$36,000 | A$360,000 | A$126,000 |
| 10 | A$60,000 | A$60,000 | A$600,000 | A$330,000 |
| 12 | A$60,000 | A$72,000 | A$720,000 | A$468,000 |
| 19 | A$60,000 | A$114,000 | A$1,140,000 | A$1,140,000 |
| 24 | A$60,000 | A$144,000 | A$1,440,000 | A$1,800,000 |
Monthly cash gets back to the old level in month 10. Cumulative cash doesn't catch up until month 19. After that, the subscription model pulls away fast.
Add churn, and every one of those catch-up points moves later.
That's why it's so tempting to abandon a perfectly good subscription model in month four. The model is working. The cash just hasn't caught up yet.
Five ways to soften the dip
- Phase it. Move new clients first and existing clients at renewal, rather than everyone at once.
- Offer an annual option, paid upfront, so some clients bring cash forward.
- Charge an onboarding or setup fee that covers your upfront cost. Show it clearly with the price.
- Keep some project work during the transition.
- Arrange finance before you need it. A facility is easier to get when your numbers look good than in month four of the dip.
The subscription vs one-off profit calculator models the dip for your own numbers, including churn. And if you sell professional services, my guide to retainers vs subscriptions covers how to package them.
Annual vs monthly: cash now, revenue later
Annual plans flip the problem around.
A customer who pays A$1,188 upfront hands you a year of cash on day one. But under AASB 15 you generally recognize the revenue as you deliver the service, so about A$90 a month (ex GST) for 12 months. The rest sits on your balance sheet as deferred revenue: a liability, because you still owe the service.
That's wonderful for cash flow. It's dangerous if you forget what it is.
Three risks to plan for:
- Spending it as profit. If you fund this year's growth with next year's service obligations, a bad renewal season can leave you short.
- The renewal cliff. If most annual customers signed up in the same month, your cash arrives in one big wave. In the book I describe annual billing as creating a big "renewal event" every year. Plan for the months between.
- Refunds. Under Australian Consumer Law, customers keep their rights when something goes wrong, so you may have to refund part of a prepayment.
How big should the annual discount be? Big enough to win the upfront cash, small enough that you'd still be better off than with monthly churn. The annual discount calculator works it out, and my guide to annual vs monthly plans covers the strategy. For the accounting itself, see revenue recognition for subscriptions.
GST, BAS and PAYG: the money that isn't yours
If you're registered for GST, one-eleventh of every GST-inclusive receipt belongs to the ATO.
For an annual plan paid upfront, the GST is generally reported in the BAS period you're paid, whether you account on a cash or accruals basis. So a big annual sale in June means a bigger BAS for that quarter, even though you'll deliver most of the service later.
Two habits that prevent nasty surprises:
- Move one-eleventh of every receipt into a separate GST account the day it lands. The ATO itself suggests keeping GST in a separate account.
- Watch your PAYG instalments. As a subscription business becomes profitable, your instalments rise with it. Ask your accountant to check them when profit jumps, so you're not hit with a large bill when you lodge your return.
The full GST picture is in GST on subscriptions and SaaS.
Model your cash flow before you switch
Talk through whether recurring revenue suits your business with a BPAG adviser in a free Subscription Profit Review.
Failed payments: the silent cash leak
Some of your churn isn't customers leaving. It's cards expiring, hitting limits or being replaced after fraud.
That money was never refused. It just didn't arrive.
Every subscription business should know, each month:
- how many payments failed;
- how many were recovered, and how quickly;
- how much revenue was lost for good.
A dunning sequence, card updater services and a clear "update your card" page recover a lot of it. My guide to involuntary churn and failed payments covers the playbook. Just remember that the new Australian rules from July 2027 still apply to how you contact customers, so keep reminders clear and honest.
How do you forecast subscription cash flow?
Not from last year's bank balance. Build it from your subscriptions.
Cash in this month = Monthly billings + Annual renewals due + New annual sales − Failed payments not recovered − Refunds
Cash out this month = Delivery costs + Payment fees + Operating costs + GST paid (in BAS months) + Tax instalments
A simple 12-month forecast needs four inputs:
- Opening MRR, split into monthly and annual customers.
- Expected new MRR, expansion, contraction and churn each month (use your own history, not hope).
- Your billing calendar, especially when annual plans renew.
- Your cost base, including payment fees and the cost to serve each subscriber.
The MRR calculator breaks out the movements. Then lay the billing dates over the top.
The cash flow numbers an accountant watches
| Number | Why it matters |
|---|---|
| Months of runway | How long you survive if growth stops |
| CAC payback | How long until a new customer repays what you spent to win them |
| Deferred revenue balance | Service you still owe, already paid for |
| Billings vs recognized revenue | The gap tells you how much cash is coming early |
| Failed payment recovery rate | How much involuntary churn you're winning back |
| GST and tax set-aside balance | Whether the ATO's money is still there |
CAC payback deserves special attention for monthly plans. If it costs you A$900 to win a customer paying A$60 a month with a 60% margin, you need about 25 months to get your money back. Grow fast on those numbers and you'll run out of cash while looking successful.
When is a subscription bad for cash flow?
Sometimes the honest answer is that a subscription makes cash worse.
- When delivery costs come upfront. If you ship hardware or a big first box, you pay out on day one and earn it back over months.
- When CAC payback is long and you're funding growth from your own cash.
- When demand is seasonal and customers cancel in the quiet months.
- When the business is already short of cash. The switching dip can be the thing that breaks it.
None of these is a reason to avoid subscriptions forever. They're reasons to model the cash before you switch, not after.
What to do next
- Pull your last 12 months of bank deposits and split them into recurring and one-off.
- Model the switching dip for your own numbers, with churn.
- Set up a separate GST account and move one-eleventh of each receipt into it.
- Map your annual renewals by month and spot the cliffs.
- Review failed payments for the last three months.
- Build a simple 12-month forecast from your MRR movements.
For everything else about running a subscription business here, from the 2027 rules to valuation, start with the Australian guide.
Free Subscription Profit Review
Australian business owners can book a free 30-minute review with a BPAG Accountants adviser. An honest conversation about:
- whether a subscription model could work for your business
- how recurring revenue could cover your fixed costs each month
- how it could lift what your business is worth
No cost, no obligation. General information only until we understand your situation.
Frequently asked questions
Is deferred revenue good or bad for cash flow?
It's good for cash, because customers have paid before you deliver. It's a risk if you treat it as spare money. Deferred revenue is a liability: you still owe the service, and if customers cancel and are entitled to refunds, the cash goes back out. A healthy rule is to keep enough cash to cover your deferred revenue balance minus the costs you've already incurred to deliver it.
Should I charge a setup fee to protect cash flow?
A setup or onboarding fee can cover the upfront cost of bringing a customer on, which helps when you're moving to monthly billing. It can also slow sign-ups, so test it. Show it clearly next to the subscription price, because Australian consumer law requires prominent total pricing for consumers, and the 2027 drip-pricing rules target charges that aren't shown with the base price.
How many months of cash should a subscription business keep?
There's no single rule, but a subscription business should be able to survive a bad month of churn or a delayed BAS payment without panic. Many owners aim for at least three months of operating costs, plus their GST and tax set-asides held separately. If you're growing fast and spending ahead of revenue, you'll want more, or a facility arranged before you need it.
Does direct debit or card billing give better cash flow?
Both can work. Cards are easy to set up but expire and get declined, which causes involuntary churn. Direct debit from a bank account tends not to expire, but can take longer to set up and settle. Many Australian subscription businesses offer both and nudge larger or annual customers toward direct debit. Whichever you use, track failed payments every month.
How do I explain subscription cash flow to my bank?
Show three things: your MRR with new, expansion, contraction and churned revenue each month, your deferred revenue balance, and a 12-month cash forecast based on billing dates. Banks understand recurring income, but they want evidence it's stable. Cohort retention tables help most, because they show customers staying, not just new ones arriving.
General information only, current as at October 2026. It isn't legal, tax or financial advice and doesn't consider your circumstances. Speak to a qualified adviser before acting.
Talk it through with a BPAG adviser
Free for Australian business owners: a 30-minute Subscription Profit Review on whether a subscription suits your business.
Robert Coorey, MBA
Robert is the author of The Subscription Playbook and Feed a Starving Crowd and a Director at BPAG Accountants in Sydney. More about Robert.
Sources
- ATO, Choosing an accounting method (GST cash and non-cash basis)
- ATO, Managing, paying GST and your cash flow
- AASB 15 Revenue from Contracts with Customers (compiled), Australian Accounting Standards Board
- Competition and Consumer Amendment (Unfair Trading Practices) Act 2026, Federal Register of Legislation
- The Subscription Playbook, Robert Coorey (2022), Chapters 1 and 3
Facts and prices checked 27 October 2026. Spotted something out of date? Tell us.