Cash Flow Forecasting
Cash flow is one of the biggest challenges for UK small businesses. Rising costs, late payments, seasonal fluctuations, and unpredictable sales can make it difficult to know what’s coming next. The right cash flow forecasting software gives business owners clear visibility over future cash movements and helps them spot when additional funding may be needed to keep operations running smoothly.
This guide covers the best forecasting tools for UK businesses, how to build a reliable forecast, and the key signs your forecast is telling you it’s time to explore cash‑flow funding.
What Cash Flow Forecasting Software Does
Cash flow forecasting software connects to your accounting system and automatically updates your forecast as invoices, bills, payroll, and tax obligations change. Instead of manually updating spreadsheets, you get:
- Real‑time cash visibility
- Automated projections
- Scenario planning
- Alerts for upcoming cash gaps
For any small business – retail, professional services, manufacturing, trades, hospitality – this clarity is invaluable.
Why Small Businesses Use Cash Flow Forecasting Software
A good forecasting tool helps you:
- Spot cash shortages weeks in advance
- Plan hiring, stock purchases, and investment decisions
- Manage supplier payments confidently
- Avoid VAT, PAYE, and corporation tax surprises
- Decide early when external funding is needed
- Reduce stress and improve decision‑making
Forecasting isn’t just about numbers — it’s about staying in control.
Best Cash Flow Forecasting Software for UK Small Businesses
1. Float - Best for Real Time Visibility
- Syncs with Xero, QuickBooks, and FreeAgent
- Clear dashboards
- Strong scenario planning
- Ideal for businesses with fluctuating cash flow
2. Futrli - Best for Advanced Forecasting
- Three‑way forecasting (P&L, balance sheet, cash flow)
- Custom dashboards
- Great for businesses planning growth or investment
3. Xero & QuickBooks Forecasts - Best for Simplicity
- Built‑in forecasting
- Automatically updates
- No extra subscription
4. Excel or Google Sheets - Best for Full Control
- Fully customisable
- Ideal for businesses with unique cash patterns
- Requires discipline and regular updates
How to Build a Reliable Cash Flow Forecast
1. Start with your opening cash balance
Know exactly how much cash you have today.
2. Add expected inflows
- Customer invoices
- Recurring revenue
- Seasonal peaks
- Grants or refunds
Use realistic payment timings, based on actual customer behaviour, not best‑case scenarios.
3. Add all outflows
- Supplier payments
- Payroll
- Rent and utilities
- HMRC (VAT, PAYE, corporation tax)
- Stock purchases
- Loan repayments
4. Update weekly
Cash flow changes fast, weekly updates keep your forecast accurate.
5. Use scenario planning
- A major client paying late
- A drop in sales
- A surge in demand
- Hiring staff
- Increasing stock levels
This helps you make confident decisions.
When Your Forecast Shows You Need Cash Flow Funding
Cash flow forecasting software doesn’t just highlight problems, it tells you when you need to act.
Here are the key signs your forecast is signalling it’s time to explore cash‑flow funding:
1. A predictable short term cash dip
- Late customer payments
- Seasonal slow periods
- Upfront stock or supplier costs
This is exactly what short‑term funding or invoice finance is designed to solve.
2. You’re profitable, but cash poor
This is a common situation. You have strong, profitable sales but your cash is tied up in unpaid invoices. Forecasting software makes this visible early.
Again, funding lines like revolving credit facilities or invoice finance can solve this problem.
3. You’re turning down opportunities due to cash constraints
If your forecast shows you can’t take on new work, buy stock, or invest in growth because cash is tight, funding can unlock the opportunity.
4. HMRC deadlines are approaching
VAT, PAYE, and corporation tax can create sudden pressure. If your forecast shows a shortfall around tax dates, funding can smooth the gap. Funders are often happy to finance an upcoming tax liability.
5. One slow paying customer is creating knock on effects
Forecasting software will show the ripple effect of a late payer. Funding, such as Selective Invoice Finance, helps you break the chain.
How Cash Flow Funding Works Alongside Forecasting Software
Forecast → Identify gap → Fund the gap → Keep the business moving.
Invoice finance converts unpaid invoices into working capital, giving you predictable cash flow even when customers take 30–60 days to pay. When combined with forecasting software, it becomes a proactive tool rather than a reactive emergency measure.
Bring in a third party expert
For businesses that need more detailed forecasting or more assistance with managing their growth, we also work alongside fractional financial directors. These are perfect for businesses who do not need, or cannot afford a full time financial director, but would benefit from the experience and expertise of such a person.
Cash flow forecasting software gives UK business owners the clarity they need to plan, avoid cash crunches, and grow with confidence. And when your forecast shows a gap – whether caused by late payments, seasonal dips, or upfront costs – cash‑flow funding can bridge it without slowing down your business.