Most businesses track clicks, impressions and traffic, but the best-run ones watch one number above the rest: return on investment. Here at AIWIZ Digital Marketing, our top KPI is our clients’ ROI. Here’s why ROI is the KPI that matters in marketing and how you can optimise it with a smarter, all-in-one solution.
What is ROI in marketing?
In marketing, ROI (Return on Investment) is how much money a business makes compared to what it spends on marketing. It helps businesses see campaigns that are driving sales and campaigns that are not worth investing in. The better the ROI, the more the marketing is working and the greater the profit margin. It enables businesses to focus on what works and improve or drop what does not work.
How do you calculate ROI?
Essentially, you can calculate ROI with a simple formula: (Return minus cost) / cost × 100, where return is ideally the gross profit the marketing produced, not just revenue.
For example, if you spend £10,000 on marketing and it brings in £30,000 in revenue, that is a 200% ROI on revenue. You got your £10,000 back plus £20,000 more. The real figure depends on your margin, which we come back to below. While the formula is simple, calculating ROI in digital marketing might be more complex, especially across a range of channels. Let’s explore that further next!
Why it beats other marketing KPIs
Before you run any marketing campaign, it’s highly recommended that you know your numbers. Clicks, impressions, and reach are great for branding, but ROI gives you a clearer picture of how your marketing is directly influencing your revenue. Having a sense of what each strategy is costing you enables you to spend your time and money accordingly. Then you can focus on the channels that are generating actual profit, not necessarily traffic.
How do you measure ROI in digital marketing?
It requires more than a formula to measure ROI in digital marketing. While the formula itself is simple:
(Return minus cost) / cost × 100
The hard part is knowing what to put in the revenue column and what to place in the cost column.
When measuring ROI, make sure you’re factoring in:
- All marketing costs: ad spend, agency fees, software, and even time from your staff.
- Revenue from individual campaigns: using tracking links or platform-specific analytics.
- The whole customer journey, not just the final click.
For example, if you spend £5,000 on a Google Ads campaign and it brings in £15,000 in revenue, that’s a 200% ROI on revenue: your £5,000 back plus £10,000. It only tells you something useful once you take off the cost of the goods or the work you sold.
Typical mistakes in ROI measurement
Even data-driven marketers fall into these traps:
- Measuring revenue, not profit: Revenue is impressive, but profit indicates how much you actually earned.
- Not attributing multi-touch journeys: Customers might touch your brand multiple times before converting.
- Ignoring hidden costs: Subscription software, internal time, or design work all count.
- Chasing vanity metrics: High impressions or clicks might feel good, but if they’re not translating to sales, they’re not providing value.
Why your ROI might be underperforming
- Poor channel alignment (this could be expenditure on channels your audiences don’t use)
- Disconnected strategy across SEO, PPC, social media (you have to ensure your cross-platform strategies complement and work effectively together)
- Low-quality traffic and unqualified leads
How do I improve return on investment?
Maximising your return on investment starts with turning your marketing into a system:
1. Consolidate your strategy across channels
Don’t let SEO, PPC and social media live in isolation. When each channel works towards the same goal, you waste less and ROI usually improves. That’s what we do at AIWIZ; our everything-in-one methodology brings SEO, paid ads, web design, social media and more together to drive predictable outcomes.
2. Focus on high-intent traffic sources
Channels that attract people who are ready to act (e.g., Google Search or retargeted ads) convert faster and with more ROI.
3. Optimise for conversions, not clicks
Your landing pages, CTAs, and website experience all need to be optimised for the purpose of converting visitors to leads and customers. Fast load speeds, persuasive copy, and solid user experience are all critical.
4. Track what actually matters
GA4, HubSpot, and your CRM can give you insight into lead quality, revenue, and lifetime value, not merely traffic volume. With established goals and performance tracking, you can see what’s performing and invest budget in the channels that are truly delivering results.
Why revenue ROI isn’t enough
One error we commonly witness is businesses calculating ROI on revenue rather than profit. It makes the numbers look better and less accurate.
You spend £10,000 and make £20,000 in sales, for instance. That is 100% ROI on revenue. But if your true profit after costs is merely £5,000, your real ROI is 50%.
It is a subtle shift in thinking, but a massive one regarding strategy!
Smarter marketing starts with ROI
Clicks and impressions don’t grow your business. Profitable sales do. When you start with ROI, every pound you spend is part of a smarter, more strategic growth plan. That’s what we deliver at AIWIZ: marketing that’s focused, efficient, and built to perform.
Curious to know what ROI-led marketing can do for your company? Contact us today!