Calculators

I want to calculate:
Net cash flow calculator
[total cash inflows] – [total cash outflows]
What is it? Net cash flow measures the actual movement of money in and out of the business over a period, showing whether cash is building up or being depleted.
Why it matters: Cash flow is the real indicator of whether the business can operate day-to-day without stress. You can show a profit on paper and still run out of money if cash isn’t coming in fast enough. This metric exposes whether your operations, invoicing, and debt collection processes are supporting the business or slowly choking it.
Quick tip
Review this monthly. If you’re profitable but short of cash, unpaid customer invoices, overstocked inventory or high loan repayments may be the cause.
Gross profit margin calculator
( [total sales] – [cost of goods sold] ) / [total sales]
What is it? Gross profit margin shows how much of every dollar earned is left after paying for the direct costs of doing the work such as materials, subcontractors and staff labour.
Why it matters: If your gross margin is too low, even a busy business can struggle to stay profitable. It provides a clear indication of whether your jobs are priced correctly and running efficiently.
Quick tip
Compare your materials and labour cost per job month-to-month. If the margin is shrinking, it’s time to either review pricing or reduce costs.
Net profit margin calculator
[net profit] / [total sales]
What is it? Net profit margin measures how much of your total revenue is left after covering all business expenses, including overheads, admin wages, rent, insurance, fuel, interest and tax. It’s the bottom-line measure of how efficiently your business turns sales into actual profit.
Why it matters: Turnover sounds good, but profit pays the bills. This metric tells you whether the business is truly sustainable after all costs are paid and how much capacity you have to reinvest or draw from the business.
Quick tip
If your gross margin is fine but your net margin is low, your overheads may be too high.
Average debtor days calculator
( [accounts receivable] – [annual sales] ) x 365
What is it? Your average debtor days tracks how long, on average, your customers take to pay their invoices.
Why it matters: Slow-paying customers starve your cash flow and force you to carry their costs. Tight debtor days protect your bank balance, reduce borrowing, and keep the business stable month-to-month.
Quick tip
If you’re waiting 45 days or more you’re funding your customer’s cash flow.
Labour utilisation rate calculator
[billable hours] / [total hours paid]
What is it? This calculation measures how much of your team’s time is billable.
Why it matters: Labour is expensive, so unbillable time quickly erodes profit. This metric shows how efficiently your team’s paid hours convert into revenue. Higher utilisation means stronger margins and better job productivity.
Quick tip
Even a 10% increase in labour utilisation can translate into tens of thousands of extra revenue per employee.