Commonly free to a few thousand dollars — but the more useful question is whether you need a landing page or just a better page on the site you already have. Both answers below, honestly.
Builders (Unbounce, Leadpages, Carrd tiers): commonly $0–$100+ a month. Fast, template-based, and rented — stop paying and the page vanishes.
A freelancer or small shop: commonly a few hundred to a couple thousand for a page built around one offer, with real copy and tracking wired in. You own it.
The monthly-fee trap: some vendors charge ongoing fees for a static page that never changes. A landing page that isn't being tested and improved doesn't need a subscription — ask what the monthly fee actually does.
One offer, one audience, one action. The page exists to close the loop an ad or link opened — same promise, same language, no navigation leaks. The copy matters far more than the design: a plain page that answers the visitor's exact question outperforms a beautiful one that talks about your company.
If you're not running ads or a specific campaign, you likely need better site pages, not a separate landing page. A service page built around what customers actually search — with clear answers and a plain next step — does the same job and keeps earning organic traffic after the campaign ends. Landing pages rent attention; site pages own it.
A landing page serves one campaign: one offer, one action, usually no navigation. A website page serves ongoing search traffic and the whole site's structure. Ads point at landing pages; Google and AI recommend site pages. Most small businesses need great site pages first.
Because builders host them and rent you the tools. That's legitimate while you're actively testing variants; it's rent when the page just sits there. A static page you own can be hosted for pennies — worth it the moment a campaign becomes permanent.
One per distinct offer or audience — not one per ad. If every ad says the same thing to the same people, one well-built page beats five thin ones. Split only when the promise genuinely differs.
Usually not — most are set to hide from search or too thin to rank. That's fine; their job is converting paid traffic. For rankings, build real site pages that answer real queries. The two jobs need different pages.