If you're asking about dental retainers, you've landed on the wrong page—this is about SEO pricing. But if you meant SEO retainer agreements, absolutely yes, they're the standard engagement model in our industry. Monthly retainers work because SEO isn't a project with a finish line. You're competing against sites that publish content daily, build links continuously, and adapt to algorithm updates in real time. A retainer gives both sides predictability: clients get dedicated hours each month, agencies can staff properly and plan work in sprints instead of scrambling for one-off projects. At Ottawa SEO Inc., roughly 70% of our client work runs on retainers ranging from $2,000 to $15,000 CAD monthly depending on market competitiveness and scope. A local Ottawa trades company might sit at $3,500/month for content, technical fixes, and citation management. A national e-commerce brand competing in saturated verticals might justify $12,000/month because they need aggressive link building, conversion optimization, and constant content production. The alternative models exist but have tradeoffs. Project-based SEO works for site migrations or one-time audits, but you lose momentum the moment it ends. Performance-based pricing sounds appealing until you realize agencies cherry-pick easy wins and clients blame the agency when Google's algorithm shifts rankings overnight. Hourly billing creates perverse incentives—why would an agency finish efficiently? Retainers align interests when structured correctly. We bill monthly, report transparently on hours allocated to content versus technical versus links, and adjust scope quarterly based on results. Clients who cancel retainers typically see rankings plateau or decline within 90 days because competitors don't stop. The real question isn't whether retainers work—it's whether the agency delivers enough value each month to justify the recurring cost. If your retainer feels like paying for busywork instead of measurable progress on traffic and conversions, that's a vendor problem, not a model problem.