Both channels reach people who are already searching. Organic SEO earns your place in the ordinary results. Paid search buys a place in the ad slots.
This page covers the words and the mechanics. For cost, return and channel choice in detail, read our guide to SEO vs PPC.
Is SEO organic or paid?
SEO, short for search engine optimization, is organic. It means improving your pages, your site and your reputation so that search engines can find them and choose to show them in the ordinary, unpaid results. You do not pay Google for an organic ranking.
You may pay people to do the work, such as writers, developers or an agency, but not the search engine. Google's guidance is blunt about the limit: no one can promise a number-one ranking.
What does “paid SEO” mean?
“Paid SEO” is not a technical term. People use it for paid search, also called pay-per-click or PPC advertising. You write ads, choose search terms and set a bid, and the ads can appear above or beside the ordinary results. The ads are advertising. They are not a form of SEO, and they do not improve your organic ranking. Some people also use “paid SEO” for hiring an agency to do SEO, which is paying for a service, not paying for a result.
How do paid search ads get onto the page?
Google runs an auction each time someone searches. According to its help page on the ad auction, the factors include your bid (the most you will pay for a click, though you typically pay less), the quality and relevance of your ad and landing page, the expected effect of ad extras such as phone numbers, minimum quality thresholds, and context such as the search terms, location and device. An advertiser with higher quality can beat a higher bidder.
So paid search is not a pure matter of budget. A clear ad and a relevant page can lower what you pay. You are charged when someone clicks.
How do organic results get onto the page?
They are chosen by the search engine from pages it has found and judged useful. Three things carry most of the weight: content that matches what people search for, a technical setup that lets the page be crawled and understood, and trust built through links and mentions from other reputable sites. One good page can appear for many related searches, which is why organic work tends to build on itself. It also takes time and steady upkeep. Our guide to organic SEO services explains the work.
Organic and paid search side by side
The table below summarizes the difference. Costs and timings vary by market, so treat it as a guide to the logic and not to the numbers.
What does each cost?
Organic SEO costs people's time, tools and content, and the result builds over months. Paid search costs a fee for each click. As market estimates, not our prices, WordStream's 2026 benchmarks, drawn from 13,474 US search campaigns between April 2025 and March 2026, give a median cost per click of $5.42 and a cost per lead of $66.69 across industries. For Attorneys and Legal Services the report shows $9.87 a click and $131.63 a lead, and for Dentists and Dental Services $8.00 a click.
Your own numbers will differ. The test that matters is cost per qualified lead or sale, for each channel. Our guide to SEO vs PPC covers cost and return in more depth.
How can you use organic and paid search together?
They work well as a pair. Paid ads give quick data on which terms convert, and that tells you which pages to build for organic search. Organic pages can raise the quality of the landing page, which helps the ad. Paid ads can cover the gap while organic work builds, and cover the launches and seasonal peaks that organic cannot reach fast enough. Report both together, so you can see which searches lead to calls, forms and sales.
How is AI search changing the picture?
AI summaries sit above both. Google says its AI features in Search follow the same SEO best practices, with no extra requirements. Pew Research tracked 68,879 Google searches by 900 US adults in March 2025 and found that users clicked a result link in 8% of visits with an AI summary, against 15% without. So fewer clicks may reach both organic and paid results, and tracking calls, direction requests and sales matters more than clicks.
How do you measure each one?
For organic search, use Search Console for clicks and impressions, and analytics for conversions from organic visits. For paid search, use the ad platform for cost per click and conversions, and your records for the sales that follow. Compare cost per qualified lead and cost per customer, over the same period. Our guide on measuring digital marketing ROI shows how.
Organic or paid: which should you choose?
Choose by situation. If you need leads this month, start with paid search, and track the cost. If your buyers search often and you can wait, build organic pages. If you are small and your area is local, begin with your business profile and reviews, then add paid search for your best-paying service. If you can afford both, run both. For the full decision, read our SEO vs PPC guide.
The bottom line
Organic SEO earns your place and builds slowly. Paid search buys a place and stops when the budget stops. Treat them as different tools for different jobs, and measure each by what it brings in.
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