Cash Flow Forecasting Made Simple

October 2, 2025by Helen

Are you currently running a service-based business?

Then you’ll know this feeling all too well…

You’re delivering excellent service, managing expenses, trying to stay ahead, spinning plates, trying to make sure one doesn’t fall, AND still hoping there’s enough time left for family

Is it possible to balance it all?

Well, the good news is yes.

With the right approach to cash flow forecasting, you can regain clarity, reduce stress, and stay in control.

In this blog we’ll explore how a clear cash flow forecast can give you confidence, how rolling forecasts keep you one step ahead, how to prepare for dips and downturns, and the simple tools we use. From straightforward spreadsheets to software such as Fathom, to make it all manageable.

What Is cash flow forecasting?

At its simplest, a cash flow forecast is a prediction of the money coming in and going out of your business over a set period. It helps you answer questions like:

  • Will I have enough money to pay my bills next month?
  • Can I afford to take on a new employee?
  • Do I need to set aside cash for a tax bill?
  • When will I have a surplus I can reinvest in growth—or take home?

Think of it as a financial sat nav. Just like you wouldn’t drive across the country without checking the route, you shouldn’t run your business without a clear view of your cash position.

What makes a good ash flow forecast?

A good forecast should give you a straightforward picture of what money is coming in, what’s going out, and how much you’ll have left at the end of each period. It doesn’t need to be complicated, but it does need to be structured properly so you can see the story your numbers are telling.

Here are the key elements that should be included:

  • Opening and Closing Cash Balances
    Start with the cash in your account at the beginning of the month and show where you’ll end up at the close. 
  • Customer Payments
    Track when cash lands in your bank, not just when invoices are raised.
  • Operating Expenses
    Note all the regular outgoings such as rent, utilities, subscriptions, and marketing costs.
  • Payroll Costs
    Factor in salaries, pensions, and tax payments, even if the timing doesn’t line up perfectly with other expenses.
  • VAT and Corporation Tax
    Set these out separately since they often fall quarterly or annually and can be sizeable.
  • Capital Expenditure (Capex)
    Include one-off purchases like equipment or software that have a big impact on cash.
  • Loan Repayments
    Don’t forget both interest and principal repayments as these can eat into cash quickly.
  • Dividends or Drawings
    If you take money out of the business, track it here to understand the true impact.

By laying out your forecast this way, you’ll be able to project forward with confidence and make decisions based on what’s really happening in your business. After a few months, patterns emerge that highlight when cash flow gets tight, letting you plan ahead instead of being caught off guard.

The Power of Rolling Forecasts

Many business owners prepare a 12-month forecast and then stop.

The biggest challenge is that business never stands still, so a static forecast quickly becomes out of date.

 A rolling forecast that is updated regularly, monthly, or quarterly, so you’re always looking 12 months ahead. This is a game changer because it:

  • Keeps your forecast adaptive and current—as your business shifts, so does your plan.
  • Keeps you decision-ready—you’re not reacting to outdated predictions.
  • Leaves you peaceful and prepared—you’re never wondering what’s around the corner.

Think of it as keeping your sat nav updated—because roads (and businesses) change.

Spreadsheets vs Software – Which Is Best for Cash Flow Forecasting?

When it comes to forecasting your cash, you don’t need to overcomplicate things. There are two main approaches: a straightforward spreadsheet or specialist forecasting software like Fathom, which is what we use in our business. Both can work brilliantly—it depends on what stage your business is at and how much detail you need.

Using a Spreadsheet

A spreadsheet is often the easiest place to start. You can lay out your income and expenses in a simple table, update it regularly, and quickly see what your cash position will look like in the months ahead.

Pros: Low cost, fully customisable, and familiar to most business owners.
Cons: Easy to make errors, takes time to update, and doesn’t provide real-time insights

Using Software like Fathom

For businesses that want deeper insights or are growing fast, tools like Fathom can save time and provide clarity. Fathom connects directly to your accounting system, updates automatically, and produces clear visual dashboards. It also lets you run “what if” scenarios—such as hiring a new employee or launching a new service—so you can see the cash impact before making the leap.

Pros: Saves time, produces professional reports, supports scenario planning.
Cons: Involves a subscription cost and a short learning curve.

Which Should You Choose?

If you’re just getting started, a spreadsheet can be more than enough. As your business grows and your decisions become bigger, investing in software like Fathom gives you more confidence and saves you valuable time. The most important thing is not which tool you use but that you’re forecasting regularly.

Planning for the Dips

Every business has busy seasons and quiet ones. The danger isn’t the quiet period itself—it’s being caught off guard by it. That’s why cash flow forecasting is so valuable. It gives you a realistic picture of when dips are likely to happen and time to prepare before they bite.

When you forecast regularly and track patterns over time, you start to see the story of your business more clearly. That means you can:

  • Spot patterns early – Look back over previous years. Do enquiries slow in summer? Does January feel flat? Forecast these into your plans so you’re not surprised when income dips.
  • Build a buffer – Aim to keep 3–6 months of expenses aside. This turns a dip from a crisis into a manageable slowdown. Even if you can’t reach that straight away, building towards it steadily gives you breathing space.
  • Plan campaigns in advance – If you know August is always quiet, plan a sales push, client event, or product launch in June or July. That way you smooth income rather than riding a financial rollercoaster.
  • Tighten payment terms – Late invoices can turn a small dip into a cash crunch. Be proactive: invoice promptly, follow up regularly, and consider asking for deposits upfront if projects are large.
  • Control spending – During quieter months, hold off on non-essential purchases or big outlays. Delaying costs until cash flow improves helps keep reserves intact.
  • Use scenarios to stay calm – Forecasting lets you model “what if” situations. What happens if income drops by 20%? How would you respond? Having a plan ready helps you stay confident instead of panicked.

With this kind of planning, dips stop being disruptive surprises. Instead, they become predictable, manageable cycles of business. You’ll know when to save, when to push sales harder, and when it’s safe to invest.

By forecasting dips into your plan, you’re not just surviving the quiet months you’re building resilience, smoothing out the ups and downs, and keeping your business moving steadily forward.

Cash flow forecasting doesn’t have to be complicated. By setting up a clear forecast, updating it regularly, and planning for dips, you’ll gain the clarity and control to make better decisions and the peace of mind that your business can support both your growth and your lifestyle.

At Beansprout, we work with business owners every day to bring their numbers to life, whether that’s through a simple spreadsheet or software like Fathom. The goal is the same: to give you confidence in your cash and control of your future.

If you want 2026 to be the year you stop firefighting and start planning with confidence, let’s chat. We can help you build a cash flow forecast that makes sense, works for your business, and frees you up to focus on growth.

Helen