Free tool
SEO Package ROI Calculator
Enter your customer value, organic lead volume and conversion rate to see projected month 12 revenue and payback at each retainer tier.
What it outputs
Month 12 revenue
Projected monthly revenue per tier
Payback
Months for revenue to cover fees
Fee
Midpoint monthly retainer per tier
Recommended tier
Best payback inside twelve months
What this tool does
Size an SEO Retainer Against Your Own Economics
This calculator projects what each SEO retainer tier is likely to be worth to you at month twelve, and how long each tier takes to pay for itself. It runs all four tiers side by side and flags the largest one that still recovers its fees inside twelve months on your numbers.
It takes four inputs: average customer value, current monthly organic leads, conversion rate, and your vertical. The first three set your current organic revenue baseline. The vertical adjusts the payback calculation for sales cycle length, since a local services enquiry closes far faster than a financial services one. Outputs are month 12 monthly revenue, incremental revenue, payback in months and the midpoint fee for each tier.
It is built for marketing leads and founders who need a defensible number before committing to a retainer, and for finance teams who want to see the payback arithmetic rather than a promise. Tier inclusions, hours and reporting cadence are published in full on our SEO packages page. You work directly with Chris, a proven specialist with 15+ years' experience, never handed off to a junior.
The calculator
Project Revenue and Payback by Tier
Tier
Foundational
Month-12 monthly revenue
£960
Tier
Growth
Month-12 monthly revenue
£1,560
Tier
Senior
Month-12 monthly revenue
£2,400
Tier
Complex
Month-12 monthly revenue
£3,900
How to use the results
Four Checks on the Projection
Start with the payback column, not the revenue bar
The tallest revenue bar is always the most expensive tier, so it tells you very little on its own. Payback is the decision number. Anything at twelve months or under is comfortable for most businesses. Between twelve and eighteen months you need a board level appetite for a longer horizon. At eighteen months the model has effectively told you the tier is too big for your current lead volume.
Treat the recommended tier as a floor, not a ceiling
The recommendation picks the largest tier that still pays back inside twelve months on your inputs. If your inputs were conservative, the tier above is often still safe. If you entered an optimistic conversion rate, drop a tier and rerun. The honest use of the tool is to run it twice, once pessimistic and once realistic, and take the tier that appears in both.
If every tier looks bad, the input to fix is conversion rate
When payback sits at eighteen months across all four tiers, the constraint is rarely the retainer size. It is usually a conversion rate under one percent or an average customer value that cannot support acquisition cost. Fix the conversion path first. Search will amplify whatever your site already does with traffic, in both directions.
Recheck the projection every quarter, not every month
Organic performance compounds unevenly, so a single month of movement is noise. Rerun the calculator each quarter with your actual lead volume and conversion rate. When two consecutive quarters clear the payback threshold for the tier above, that is the point to upgrade, and no earlier.
Worked example
A B2B SaaS Business at £500 Customer Value
Forty organic leads a month at a 3% conversion rate and £500 average customer value is £600 of monthly organic revenue today. At the growth tier multiplier that becomes roughly £1,560 a month by month twelve, and at senior tier roughly £2,400.Payback, not the biggest bar, decides the tier.
Current monthly revenue
£600
Growth tier month 12
£1,560
Senior tier month 12
£2,400
At this lead volume the honest read is that neither tier pays back quickly, and the first job is lifting conversion rate or customer value. That is exactly the sort of answer the tool is meant to surface before a retainer is signed.
FAQ
SEO Package ROI Questions
Next step
Turn the Projection Into a Real Scope
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