How much does a custom app cost for a small business?

Ask five development firms what your app will cost and you'll get five numbers, some of them ten times bigger than others, plus at least one "it depends." It does depend, and what helps is knowing on what. Below are the three usual ways small businesses pay for custom software, roughly what each costs in 2026, and the costs that rarely make it into a proposal.

The three ways small businesses usually pay

An agency's fixed bid: $50,000 to $250,000 or more

A traditional agency works out the scope up front and quotes a fixed price. For a small-business web app, bids commonly come in between $50,000 and $150,000. Mobile apps, and anything that has to connect to your other systems, push higher.

The bigger issue is usually the change orders rather than the starting price. A fixed price needs a fixed plan, and plans almost always change once real work begins. Industry surveys have found that roughly half of custom software projects run significantly over their original estimate. Anything discovered after signing turns into a billable amendment, and you're negotiating from a weak position, because a half-built app is no use to you until it's finished.

A freelancer: $40 to $150 an hour, with no fixed end

Hiring a solo developer can work well, and some of the best software around was written by one careful person. You are taking on three risks at once, though. Hourly billing has no ceiling, so the estimate is only a guess. One person can get sick or take a better job offer. And when the project ends, so does their attention, so nobody keeps the app up to date and it slowly starts to fall apart.

A flat monthly fee: from $1,000 a month

This is a newer way of buying software, and it's the one we use at GO Build Labs. One monthly price covers design, development, hosting and maintenance, usually with a yearly commitment rather than month to month. Our own plans start at $1,000 a month, and most clients land between $2,000 and $5,000.

You're paying for a team's steady time rather than a fixed list of things to deliver, so the math works differently. A focused first version is usually live within the first month or two, and then the same team keeps improving it. A full system such as a custom ERP takes six months or more at that same steady pace. Because most firms working this way, us included, ask for a yearly commitment, the fair way to compare it with a fixed bid is to look at the yearly total rather than the monthly figure. What changes is who carries the risk. The provider absorbs the surprises, so you don't see them come back to you as change orders.

Costs that rarely show up in the quote

Hosting is the first. Running a typical small-business app costs somewhere around $50 to $500 a month, and it's often left out of the quote entirely until launch.

Then there's maintenance. The usual rule of thumb in the industry is 15 to 20% of the build cost every year. The tools apps are built with get updated, web browsers change, and the outside services an app connects to change how they work or stop offering features. An app nobody maintains gets a little less reliable every month.

Most agency contracts cover bug fixes for 30 to 90 days after launch. After that, fixes are billed by the hour.

Last, there's the cost of whatever you don't automate. Your staff keep spending hours every week re-typing information from one system into another. That's the cost of doing nothing, and it belongs in the comparison too.

What pushes the price up

The number of screens has surprisingly little to do with it. The cost comes from the decisions the software has to handle, such as taking payments, connecting to other companies' software, working without an internet connection, giving different people different levels of access, and meeting regulatory requirements. A twenty-screen app with simple rules is often cheaper than a five-screen app that has to keep in step with an old ERP system.

So what should you budget?

For most small businesses, a useful first version of a custom app costs somewhere between $8,000 and $40,000 to get to launch, however the billing is set up. The billing mostly decides who pays when something unexpected comes up. With a fixed bid, surprises are your problem. With hourly billing, they're your problem with no limit. With a flat monthly fee, they're the developer's problem.

Whichever way you go, ask every provider three questions. Who owns the code? What will month thirteen cost? And when will I first see it running?