Start here · why ROI is not a maths exam
Most people skip the ROI Calculator because they think it's for accountants. It isn't. It's for the busy business owner who knows — deep down — that something is leaking money, just can't put a number on it.
You don't need to be good with numbers to use this tool. If you can describe the problem in a sentence, you have everything you need. The calculator does the maths. Your job is to be honest about what you see in your business.
The goal isn't a perfect number. The goal is a defensible starting point — something good enough to make a decision, or to bring to a conversation with someone who can help.
💡 A promise
If you can answer 4 simple questions (one for each tool you pick), you can quantify a loss in 90 seconds. If you'd rather skip the theory, jump straight to the example that looks most like your business below.
The four numbers that matter (and that's it)
Every ROI question — yours, mine, anyone's — comes down to four numbers. That's it.
- What it costs to fix. The price of the tool, person, system, or change. One-off + ongoing.
- What you'd save or earn each month if you fixed it. The monthly value of the loss going away.
- How long you'll evaluate it over. Usually 12 months. Sometimes 6 or 24.
- That's it. The calculator turns those three into ROI %, payback months, and net benefit.
If you can answer numbers 1 and 2 with rough figures, you're done. The rest is just the calculator doing arithmetic.
How to open the tool · 60 seconds
- Go to your dashboard → "Your snapshot" card → click ROI Calculator.
- Click + New Scenario on the left.
- Give it a name like "Fix slow follow-up" or "Replace manual invoicing".
- Pick a Loss Type from the dropdown — the next section tells you which one.
- Fill in the few numbers the tool asks for. Watch the ROI % appear live.
The tool auto-saves. You can switch loss types, change your mind, build 5 scenarios side-by-side. Nothing is permanent except the insight you'll take away.
Picking the right Loss Tool · a no-jargon chooser
Nine loss tools sounds like a lot. In practice, your situation usually matches one obvious choice. Read these one-liners and pick the one that makes you nod.
Time Loss · Meetings, manual data entry, status chasing, context-switching — anything that quietly eats hours from you or your team.
Revenue Loss · Leads come in and don't get followed up. Quotes don't get sent. Sales stall because no-one owns them.
Profit Loss · Same as Revenue Loss, but you want the more conservative number that survives a CFO conversation.
Productivity Loss · "We are busy but we are not getting anywhere." Team works hard, capacity is lost to friction.
Marketing Waste · You suspect half your marketing spend is working — you just don't know which half.
Customer Churn · Customers come in, customers leave. You've got a leaky bucket and you want to know how much it's leaking.
Opportunity Cost · A bottleneck (people, system, time) is stopping you from saying yes to revenue that's already in front of you.
Operational Cost · Too much of the day is manual admin, mistakes need redoing, you're paying for tools nobody uses.
Risk Cost · You've spotted a risk (compliance, reputation, key-person, security) and can't justify fixing it without a £ on it.
Still not sure? Pick Time Loss. It's the easiest one to fill in and almost every business has one.
Worked example 1 · The chasing-paperwork plumber
⏱️ Time Loss · worked example
Sarah runs a small plumbing business with 4 engineers.
Every morning, she spends 1 hour chasing engineers for yesterday's job sheets and reconciling them with invoices. She also takes 30 minutes a day on each engineer (so 2 hours) to coordinate the day.
Numbers Sarah/Tom/etc. plugged in
- Hours per occurrence3 hours/day
- People involved1 (Sarah)
- Hourly cost£40/hour (her time)
- Frequency22 days/month
Calculator shows · 3 × 1 × £40 × 22 = £2,640 / month
Investment · A simple job-management app at £150/month.
Payoff · A £150 investment to recover £2,640/month of Sarah's time is a £2,490/month win. That's a 1,660% ROI — and Sarah can use those 3 hours to win new work instead.
The honest takeaway · It's a no-brainer. Pay the £150.
Worked example 2 · The marketing agency with cold leads
📣 Marketing Waste · worked example
Tom runs a B2B agency that spends £6,000/month on Google Ads.
His sales team complains that most leads coming through don't qualify. Tom suspects roughly 50% of his ad spend is bringing in the wrong audience.
Numbers Sarah/Tom/etc. plugged in
- Monthly marketing spend£6,000
- Waste %50% (rough but honest)
Calculator shows · £6,000 × 50% = £3,000 / month
Investment · £800/month for a fractional marketing consultant to rebuild the targeting + landing pages.
Payoff · If the consultant cuts waste from 50% to 20%, Tom saves £1,800/month — for an £800 spend. That's 125% ROI in month 1, payback in under 3 weeks.
The honest takeaway · Don't double the ad spend. Fix the leak first.
Worked example 3 · The recruiter losing candidates to slow follow-up
💸 Revenue Loss · worked example
Priya runs a recruitment firm. She gets 40 candidate enquiries a month.
Her team only properly follows up on ~25 of them. The other 15 go cold. Of those 15, Priya thinks she'd convert 4 if she got back to them inside 24 hours. Her average placement fee is £4,500.
Numbers Sarah/Tom/etc. plugged in
- Lost sales per month4 placements
- Average sale value£4,500
Calculator shows · 4 × £4,500 = £18,000 / month
Investment · £600/month for a CRM with auto-responders and an SLA dashboard.
Payoff · Recovering even half of those 4 placements pays for the CRM 15× over. ROI in the thousands of %.
The honest takeaway · The CRM costs less than one lost placement. Done.
Worked example 4 · The SaaS founder bleeding customers
👋 Customer Churn · worked example
Dave runs a £30/month SaaS for tradespeople. 500 customers.
He loses about 20 customers every month. Lifetime value (average customer stays 18 months at £30 = £540) is roughly £540.
Numbers Sarah/Tom/etc. plugged in
- Customers lost per month20
- Customer lifetime value£540
Calculator shows · 20 × £540 = £10,800 / month walking out the door
Investment · £1,500/month for a customer-success person to onboard new customers properly and check in at month 1.
Payoff · If churn drops from 20 to 12/month, Dave saves £4,320/month in retained LTV. That's 188% ROI on the customer-success hire — and it compounds because retained customers keep paying.
The honest takeaway · Retention beats acquisition. Always.
Worked example 5 · The events business with unsold seats
🎯 Opportunity Cost · worked example
Maria runs a training business. Each cohort has 12 seats.
The last 4 cohorts sold out — but with a 6-week waiting list. Maria estimates she could run 2 extra cohorts a year (24 extra seats × £1,200 each = £28,800 extra revenue) if she had a second trainer.
Numbers Sarah/Tom/etc. plugged in
- Missed opportunities per month2 seats (24 / 12 months)
- Average opportunity value£1,200
Calculator shows · 2 × £1,200 = £2,400 / month
Investment · £3,000/month to bring on a freelance trainer + scheduling.
Payoff · At first glance this loses money — £3,000 cost vs £2,400 monthly value. But Maria's calculator shows that with the second trainer, the bottleneck disappears entirely. She can re-model with higher seat counts and likely finds positive ROI. The tool helped her see that the constraint is real.
The honest takeaway · ROI < 100% doesn't mean 'no'. Sometimes it means 'change the model'.
Worked example 6 · The accountant doing 100 manual reconciliations
⚙️ Operational Cost · worked example
James is an accountant doing books for 80 SMB clients.
Every month he spends ~£2,000 of his own time on manual reconciliations, ~£1,500 redoing client work that came in wrong, and ~£500 on spreadsheets that should be in a proper tool.
Numbers Sarah/Tom/etc. plugged in
- Extra cost / month£500
- Rework cost / month£1,500
- Manual process cost / month£2,000
Calculator shows · £500 + £1,500 + £2,000 = £4,000 / month
Investment · £900/month for accounting-automation software + client portal.
Payoff · James saves £3,100/month net. Payback inside the first month. And he can take on more clients with the time freed up.
The honest takeaway · Three small leaks add up to one big bucket of money.
Worked example 7 · The contractor sitting on a compliance risk
⚠️ Risk Cost · worked example
Aisha runs a manufacturing business. She's known for 6 months that her ISO certification is at risk because their documentation isn't keeping up.
If they fail the audit, they lose their two biggest contracts (worth £400,000/year combined). Aisha thinks there's a 30% chance of failure if she doesn't fix it.
Numbers Sarah/Tom/etc. plugged in
- Probability of risk30%
- Estimated impact£400,000
Calculator shows · 30% × £400,000 = £120,000 exposure ÷ 12 = £10,000 / month equivalent
Investment · £2,000/month for a 6-month consultant project to rebuild the documentation.
Payoff · £2,000 to neutralise £10,000/month of risk equivalent. ROI of 400%+ — and it's the kind of fix that pays for itself the moment it removes the risk.
The honest takeaway · The cost of not fixing risk is invisible — until it isn't.
Reading the result · what the ROI %, payback and net benefit actually mean
When the calculator shows you four numbers (ROI %, Net benefit, Payback, Monthly cashflow), here's what each one is actually telling you, stripped of jargon.
ROI %
- Above 100%: easy yes. You'll more than double your money.
- 25–99%: healthy. Worth doing.
- 1–24%: modest. Check your assumptions are conservative.
- 0% or negative: rethink. This investment loses you money.
Net benefit (£)
- The cash that lands in your pocket over the time horizon.
- If it's positive — that's literally money on the table.
- If it's £100k+ — make this a priority, not a maybe.
Payback (months)
- How long before the one-off cost pays itself back.
- Under 6 months: very low risk.
- 6–12 months: typical for most business changes.
- Over 24 months: re-check whether you're underestimating returns.
- Shows '—' if cashflow never breaks even (don't do it).
Monthly cashflow
- What lands in the bank each month after the recurring cost.
- This is the number that protects your cashflow position.
- Negative? You're funding it from elsewhere — make sure you can.
How to be honest with your numbers (without becoming a finance person)
You don't need a finance background. You need three habits:
- Round, don't agonise. "About 4 hours a day" is fine. "3.7 hours weighted average" is overkill.
- Lean conservative. If you think the number is between 10 and 20, use 12. A 40% ROI you can defend in a meeting beats a 200% ROI nobody believes.
- Write the source in the Notes field. "From CRM, last 3 months avg." Future-you will thank present-you when someone challenges the number.
That's it. That's the whole skill.
Frequently-felt frustrations · and the easy fix
I don't know exactly how many hours we lose.
Pick a number that feels right. If you're between 2 and 5 hours, use 3. The whole point of the tool is to make the invisible visible — perfect data isn't the goal, directionally-right is.
The ROI looks too good. Did I do it wrong?
Probably not. Most businesses are stunned the first time they put numbers on a leak. Cross-check by halving your return assumption and seeing if it's still worth doing. If it is, your case is bulletproof.
The ROI is negative. Should I give up?
No — it's telling you the maths doesn't work yet. Try a cheaper fix. Or look at the Opportunity Cost example: sometimes a negative ROI on this scenario means the real fix is a different scenario.
What's the difference between Revenue Loss and Profit Loss?
Revenue Loss is the top-line number — what you'd have invoiced. Profit Loss multiplies it by your margin (e.g. 30%) so you get the actual cash hitting the bank. Use Profit Loss when you're talking to finance people. Use Revenue Loss when you're talking to sales people.
What's a 'time horizon' and why does it matter?
It's how far out you're looking. A 12-month horizon means 'over the next year'. Longer horizons make the ROI look bigger (more months of return) but mean you wait longer to see the result. 12 months is the sensible default.
Can I model the same problem with different fix options?
Yes — that's exactly what the multi-scenario design is for. Build 'Scenario A · cheap fix', 'Scenario B · proper fix', 'Scenario C · full overhaul'. Compare the ROI %, payback, and net benefit side-by-side.
I'm bored of numbers. Can someone just walk me through this?
Yes — book a Discovery call from the dashboard. We'll do it with you live. It usually takes 20 minutes and the supplier walks away with a number they didn't know they had.
From a number to a decision · what to do next
A number on its own isn't a decision — it's the start of one. Here's the flow most suppliers follow once they have a calculator output they trust:
- Show it to one person. A co-founder, a partner, a trusted advisor. "Does this number look sensible to you?" That conversation alone often surfaces the next fix.
- Pick the highest-ROI scenario first. Not the biggest absolute number — the one with the best return on the smallest investment. That's where momentum comes from.
- Set a 90-day check-in. Diary it now. Did the fix actually deliver what the calculator predicted? If yes, do the next one. If no, adjust your assumptions and re-run.
- Tell the calculator about it. Update your Notes field with what actually happened. Build a track record of decisions over time.
🎯 The honest truth
Most businesses have £5k–£50k of monthly waste hiding in plain sight. The hardest part isn't finding it. The hardest part is being honest enough to put a number on it. That's what this tool — and this guide — is for.