How much does it cost to build a small app with AI?

Less than you'd expect, more than zero, and the costs split into two parts worth keeping straight in your head.

The first cost: the tool

An AI coding assistant on a paid plan runs about twenty dollars a month, which buys you a generous amount of usage shared between the chatbot and the coding tool. This is Anthropic's Claude Pro, OpenAI's ChatGPT Plus paired with Codex CLI, Google's paid Gemini tier, or xAI's Grok tier. For the size of projects this site is about, twenty dollars a month is enough, and you can cancel anytime.

There's also a metered, pay-per-use option through each provider's developer console, billed by the token. Most days that comes to less than a dollar, but it varies, and it can climb if you leave the AI working unsupervised on a large task. For someone shipping their first few projects, the flat monthly fee is simpler and safer. Treat metered billing as an upgrade you may never need.

The second cost: the hosting

Once your app exists, it has to live somewhere with a public address, which means renting either a slice of someone else's computer or a free spot on a service that gives them away.

A static site, like a personal website or a small marketing page, costs zero dollars a month to host. GitHub Pages, Netlify, and Vercel all have free tiers that will handle far more traffic than a small site ever sees. The only ongoing cost is the domain name, which is ten to fifteen dollars a year if you want yourname.com instead of yourname.github.io/site.

An app with a database, like a quote calculator that remembers your previous quotes, may cost a few dollars a month once it's in production. The same providers offer small databases on free or very cheap tiers. Anything that handles money or sensitive data is a different conversation, and you should expect to spend more carefully on hosting, security, and review.

What you're not paying

You are not paying a developer. The hourly rate for a freelance developer in the US ranges from about seventy-five dollars on the low end to several hundred at the senior end. A small site or tool that would have been a several-hundred-dollar project a year ago is now a Saturday afternoon and the cost of the subscription you already pay.

You are also not paying a SaaS company. A lot of the small tools you might build with AI replace a fifteen-dollar-a-month subscription you don't quite use. The math compounds. Three of those replaced is the cost of the AI tool itself, and the version you built is exactly shaped to your work.

The honest add-ups

Here's the full bill for a typical first-year setup, building three small projects with one tool.

One AI coding subscription at twenty dollars a month is two hundred forty dollars a year. One custom domain is twelve dollars a year. Hosting on free tiers is zero. A code editor like VS Code is free. The total comes to about two hundred fifty dollars for the year, less than a single freelance project would cost, and it covers as many projects as you have the patience to build.

For the kind of person who does the math before they buy a subscription, that's the number to compare against the alternative, which is paying someone several hundred dollars apiece each time you want a small thing built.