Ask what software costs to build and you will hear it depends, which is true and also useless. You cannot plan around it depends. So here is the version nobody gives you, an honest breakdown of what an MVP, a SaaS, or an AI feature actually costs to build with a solo developer in 2026, and what moves the number.

The Honest Ranges

These are real solo developer ranges, not agency rate cards and not offshore lowball numbers. A focused MVP, the first real version of an idea built to prove it works, typically lands between $4,000 and $15,000. A full web app or SaaS, with accounts, payments, an admin side, and the polish to handle real users, usually runs $12,000 to $40,000. Adding an AI feature to a product you already have tends to fall between $3,000 and $12,000. An AI agent or automation is often $2,000 to $10,000. A marketing site or landing page sits lower, around $1,500 to $6,000. Those are wide ranges on purpose, because the thing inside them that decides where you land is scope.

What Moves The Number Up

Price tracks complexity, and a handful of features carry most of it. User accounts and authentication add real work. Payments and subscriptions add more, because, as anyone who has shipped them knows, the webhooks and edge cases are the hard part. An admin dashboard, real time features, AI, and third party integrations each add to the total. So does file and media handling. The other big lever is how production ready it needs to be. A prototype built to test an idea with a few users is cheaper than something engineered to handle real load and scale from day one. And a rushed timeline costs more, because compressing the work means reorganizing everything else around it.

What Keeps The Number Down

The biggest cost saver is scope discipline. Most first versions are too big, packed with features that feel essential while imagining the product and turn out to be noise once real users arrive. Cutting to the smallest version that genuinely proves the idea is the single most effective way to spend less and ship sooner, and it is usually the first conversation I have with anyone. Working with a solo developer rather than an agency also lowers the number, because an agency marks up every hour to cover account managers and coordination. One engineer who owns the whole stack carries none of that overhead, so the same result costs less and you talk directly to the person building it.

Get A Real Number

Ranges are useful for orientation, but your project has a real number, and you can get close to it quickly. I built a cost estimator that lets you pick what you are building and get an honest ballpark in a few clicks, with no email and no sales call required to see the figure. If you want a properly scoped number, that is what a short call is for, and the MVP Development service page is the place to start. The worst way to budget software is a vague it depends. The best way is an honest range, an understanding of what moves it, and a real estimate for your actual scope.

Common Questions

What does an MVP cost? With a solo developer in 2026, usually $4,000 to $15,000 depending on scope. A full SaaS often runs $12,000 to $40,000. What makes it more expensive? Complex features like accounts, payments, real time, AI, and integrations, plus how production hardened it needs to be and how rushed the timeline is. Why is solo cheaper than an agency? No markup for account managers and coordination overhead, and you talk directly to the builder. How do I get a real number? Use the cost estimator for a ballpark, or book a call for a scoped number.