Why cashflow kills good trade businesses

You can be fully booked, delivering quality work, and still go under - if the money isn't coming in on time. Cashflow problems don't discriminate between good tradespeople and bad ones. They happen to experienced operators running solid businesses, often not because of bad management but because of timing: the gap between when money goes out and when it comes in.

According to Stats NZ data on business closures, cashflow difficulties are consistently among the top three causes of trade business failure - ahead of competition and behind economic conditions. The problem is almost always preventable.

Here's a practical, no-jargon guide to managing cashflow as a tradie in New Zealand.

Understand your cashflow cycle

Before you can improve your cashflow, you need to know what it looks like. Your cashflow cycle is the time between:

Paying for materials, labour, and overhead
Receiving payment from the client

For most NZ tradies doing residential work on 14-day terms, the cycle is:

You buy materials (money goes out immediately)
You do the work (your time is committed)
You send the invoice at completion
You wait 14-30 days for payment

On a $10,000 job, you might be $4,000-$6,000 out of pocket in materials and wages for 3-5 weeks before you see any money. Multiply that across two or three simultaneous jobs and the numbers get uncomfortable fast.

Rule 1: Invoice immediately

Every day you delay invoicing is a day later you get paid. This sounds obvious, but many tradies invoice weekly, or when they remember, or after they've had a chance to tally everything up.

Make it a rule: invoice the same day the job is done. Or, for larger jobs, invoice at agreed milestones - not at the end.

If you're doing a 3-week renovation for $25,000, don't invoice the full amount at the end. Invoice in three stages:

Deposit (30-50%) before you start - covers your material costs
Progress payment (30-40%) at a defined mid-project milestone
Final payment (20-30%) on practical completion

For a detailed guide on invoice timing and format, see our guide to writing invoices that actually get paid.

Rule 2: Always require deposits

A deposit is not a sign of distrust - it's standard business practice, and most professional clients expect it. For any job over $500, ask for a deposit before you start.

Why deposits matter for cashflow:

They cover your material costs before you spend a dollar
They confirm the client is serious
They reduce the amount at risk if payment becomes a problem later

A typical deposit structure:

Jobs $500-$2,000: 50% deposit upfront
Jobs $2,000-$10,000: 30-40% upfront
Jobs over $10,000: 20-30% upfront, with a progress payment schedule

Clients who push back hard on a reasonable deposit are often the ones who'll be slow with the final invoice. The deposit conversation is a useful filter.

Rule 3: Tighten your payment terms

If you're currently running 30-day payment terms, there's a simple experiment worth trying: move to 14 days and see what happens. Most residential clients will pay within 14 days if that's what's on the invoice. Many were paying within 14 days anyway - you were just giving them extra time to delay.

Standard NZ payment terms by work type:

Residential under $5,000: 7 days
Residential over $5,000: 14 days
Small commercial jobs: 14-20 days
Large commercial / government: 20-30 days

For commercial work, shorter terms are worth asking for - many businesses will agree to 14 days if you ask. The worst they can say is no.

Whatever terms you use, put them in writing: on your quote, your contract, and every invoice. Vague terms ("payment on receipt," "net 30") create ambiguity that clients exploit. Write an actual due date: "Payment due by [specific date]."

Rule 4: Know your numbers every week

Cashflow management doesn't require complex accounting software. It requires awareness. A weekly cashflow check - 10 minutes on Monday morning - can prevent most crises before they happen.

A simple weekly review covers three things:

Money coming in: What invoices are due this week? Which ones are overdue?
Money going out: What bills, wages, and supplier payments are due?
Net position: What's the gap, and do you have enough in the account to cover it?

If you use Xero or MYOB, both have cashflow forecasting tools that automate most of this. Xero's cashflow feature pulls your invoices, bills, and bank balance together into a 30/60/90-day view. If you're not using accounting software yet, a basic spreadsheet works fine.

The goal isn't precision - it's awareness. Knowing three weeks in advance that you're going to be short gives you time to act. Discovering the shortfall on payday doesn't.

Rule 5: Chase overdue invoices immediately

The moment an invoice goes overdue, act. Every day you wait makes recovery harder. Invoices chased within 14 days of the due date have significantly higher recovery rates than those left for 30+ days.

Set up a simple overdue schedule:

Due date + 1: Reminder email
Due date + 3: Phone call
Due date + 7: Second written follow-up
Due date + 14: Formal written demand
Due date + 21: Escalate (Disputes Tribunal, professional follow-up service)

Don't wait until it's "worth" chasing. A $300 invoice left unpaid for 90 days is harder to collect than a $3,000 invoice chased on day 3. The principle is the same regardless of amount.

For the full step-by-step process, see our guide to what to do when a client refuses to pay.

Rule 6: Build a cash buffer

A cash buffer is money held in reserve specifically to cover the timing gaps in your cashflow cycle. It's the difference between a slow payment being a minor inconvenience and a major crisis.

The target for most trade businesses: 4-6 weeks of operating expenses in a separate account.

For a business spending $15,000/month on wages, materials, and overhead, that's $15,000-$22,500. If you're not there yet, don't try to build it all at once. Set aside 5-10% of every payment received until you reach the target.

Keep the buffer in a separate account so you're not tempted to spend it. High-interest savings accounts from BNZ, Kiwibank, or ASB currently earn 4-5% on call deposits - your buffer should be working for you while it sits there. A buffer covers timing gaps; the right tradie insurance covers the one-off disasters a buffer can't - like a stolen trailer of tools or accidental damage on a job.

A cash buffer absorbs the timing gaps, but it will not cover a catastrophic one-off - a client suing over a botched job, a fire on site, or your tools being stolen overnight. That is what business insurance is for. See the risks of running a trade business uninsured and the main types of business insurance NZ trades use.

Common cashflow traps for NZ tradies

The growth trap: Taking on more work than your cashflow can support. More jobs means more materials and wages going out before the payments come in. Fast growth is often the trigger for cashflow crises.

The big job trap: A large contract dominates your revenue, so you sub out other work or decline smaller jobs. If the large client pays late, your whole business is exposed.

The seasonal trap: Many trades (landscaping, painting, roofing) have strong and weak seasons. Building up the buffer in good months is essential - the slow months will come.

The materials trap: Buying materials on credit without accounting for the repayment timing. Trade accounts with Mitre 10, Placemakers, or Ideal Electrical are useful, but the 30-day terms mean you need your own clients to pay within 30 days to close the loop.

Using your accounting software for cashflow visibility

Xero: The cashflow summary and short-term cashflow reports are excellent. Connect your business bank account for live updates.
MYOB: Strong for job-costing and tracking profitability per job, which feeds into cashflow awareness.
Tradify: Purpose-built for tradies. Good mobile invoicing that makes same-day invoicing easy.
Hnry: Ideal for sole traders. Handles GST, tax, and invoicing automatically.

Not sure how much to set aside? Use our free GST calculator to quickly work out the GST on any invoice.

If you're still invoicing on paper or in Word, the single biggest cashflow improvement you can make right now is switching to any of these tools. The visibility alone changes behaviour. Not sure which app to choose? See our best job management software for NZ tradies comparison.

What to do when cash gets tight

Despite good habits, every trade business will hit a cashflow squeeze at some point. When it happens:

Call your bank immediately - don't wait until you're in overdraft. Banks are more helpful before a crisis than during one. A short-term overdraft facility or business credit card is much easier to arrange when you're not desperate.
Invoice everything outstanding right now - if you have uninvoiced work, invoice it today. Even an advance invoice or partial invoice gets the clock running.
Chase every overdue invoice - make the calls yourself or use a professional service. This is not the time for polite emails.
Talk to your suppliers - most NZ trade suppliers (Mitre 10, Placemakers, Noel Leeming Business) will extend credit terms if you ask early. A call explaining your situation is far better than a missed payment without notice.
Consider invoice financing - services like Prospa, Spotcap, or Debtor Finance NZ will advance you a percentage of your outstanding invoices immediately. The cost is real (typically 2-5% of the invoice value), but in a genuine cashflow emergency it buys time.

FAQ

How do I handle GST and cashflow? GST collected on invoices is not your money - it belongs to IRD. The most reliable approach is to move GST amounts into a separate account every time you receive a payment. When your GST return is due (typically every two months), the money is already set aside. Many NZ tradies get into trouble by spending GST before it's due.

Should I offer early payment discounts? A 1-2% discount for payment within 7 days can improve cashflow, but the maths only works if the time value of money justifies the discount. For most small trade businesses, tighter terms and better follow-up are more effective than discounting.

How do I price jobs to improve cashflow? Factor in your materials cost and labour before quoting. If a job requires $5,000 in upfront materials, either require a deposit to cover it or price a small carrying cost into your quote. Cashflow-aware quoting prevents you from doing profitable work at a cashflow loss.

My biggest client pays late every time. What should I do? First, have a direct conversation with their accounts team about your terms. Many large commercial clients pay late by default - not because they can't pay, but because they process invoices in batches. Asking to be put on the weekly payment run is a legitimate request. If they consistently pay 30 days late, price that delay into your rates or require a partial deposit.