Measuring SEO ROI without fooling yourself

Every agency report shows traffic rising. Far fewer show what that traffic was worth. This guide is the calculation to run yourself, monthly, so the renewal conversation is a decision rather than a leap of faith. It sits alongside SEO reports explained, which covers what the agency should be sending you in the first place.

The three numbers you need first

1. Enquiry to sale rate. Of every ten enquiries, how many become customers? Most businesses guess this high. Check it against your records.
2. Average sale value. The first transaction only.
3. Customer lifetime value. What a typical customer is worth over the whole relationship, including repeat work and referrals.

Without these, no ROI figure means anything. With them, the maths is simple. If you close one in four enquiries and a customer is worth £2,000 over their life, each organic enquiry is worth £500 before costs. A £1,200 retainer needs fewer than three extra enquiries a month to justify itself.

Working out what organic search actually produced

The honest answer is that attribution is imperfect and you should account for that rather than pretend otherwise. Three practical steps get you close enough to make decisions.

• Separate branded from non branded search. People searching your company name were coming anyway. Growth in non branded search is the thing SEO is buying you.
• Track calls, not just forms. For most local businesses the majority of enquiries arrive by phone. A campaign judged on form fills alone will look far worse than it is.
• Ask every enquirer how they found you. Crude, unreliable, and still the single most useful check on your analytics.

Google Search Console gives you the branded and non branded split for free, and it is your data rather than the agency's, which makes it the best cross check you have.

Break even, payback and the honest timeline

Break even is the month where new organic revenue covers that month's fee. Payback is the point where cumulative return covers everything spent to date, including the months where nothing happened. Payback always arrives considerably later, and it is the number that should drive your commitment period.

If those windows feel long, that is the correct reaction, and it is why how much SEO costs should be judged as a twelve month decision rather than a monthly one.

Reporting that flatters a flat campaign

Any one of these on its own may be innocent. Several together usually means the campaign is being managed for the report rather than for you. At that point, read when to fire your SEO agency before the next renewal date, and if you decide to move, how to switch SEO agencies covers doing it without losing ground.