What does custom software maintenance cost per year?

Short answer: Custom software maintenance isn't a fixed annual fee. After Sierra builds your system, you own the code and can choose to maintain it in-house, hire Sierra for ongoing support, or use another developer. If you hire Sierra, costs scale with complexity and change frequency—typically ranging from a few hundred dollars per month for light monitoring and bug fixes to several thousand for active feature work and integrations. Many clients discover they need far less ongoing maintenance than they expected.

Why there's no standard price

Maintenance is tied directly to what your software does and how often business needs shift. A simple internal tool that sits stable for a year might need almost nothing. A client portal that integrates with three external systems and gains new features quarterly costs more to keep running smoothly. This is actually good news: you're not paying for a subscription tier you don't use.

The real cost trap most teams fall into is the opposite problem. They build software in-house or with a freelancer, then realize they have no one to call when something breaks, integrations fail, or they need a quick fix. That downtime costs far more than planned maintenance ever would.

What maintenance actually covers

When you work with Sierra for ongoing support, the team handles:

• Bug fixes and stability monitoring

• Security patches and dependency updates

• Connecting new third-party tools or APIs your business starts using

• Small feature additions or tweaks based on how your team actually uses the software

• Performance tuning if the system slows down as data grows

You're not locked into a bloated plan. Many clients pay month-to-month or set retainer hours—say 20 hours per month—and use them as needed. Some months they're untouched. Other months a critical integration fails and those hours cover the fix.

The cost of not maintaining

Here's where maintenance becomes cheap: consider the alternative. A payment processor updates their API and your integrations break without warning. Your team can't process orders or pull client data. Or your software sits unchanged for two years while security holes accumulate, and a breach exposes customer information.

Even "set it and forget it" systems degrade. Third-party services evolve, browser standards change, hosting environments update. What worked flawlessly in month one may start failing in month twelve if no one is watching. The cost of an emergency call at 2 a.m. to fix a live production issue far exceeds the cost of planned quarterly maintenance.

You own the code

A critical distinction: Sierra builds custom software and you own 100% of the code. That means you're never trapped. If maintenance costs become a problem, you can hand the codebase to another developer, maintain it internally, or walk away. You're not paying a vendor tax forever. This freedom also means you can shop around for the best support price and service fit as your needs evolve.

Some clients discover they have the engineering chops to maintain their own software after the initial build. Others realize maintenance is a tiny line item compared to the revenue the software generates, so they stay with Sierra. Both are rational choices because you have options.

What to expect in your first year

Most teams need a bit of support in the months after launch—final tweaks, edge cases they didn't anticipate, integration fine-tuning. Maintenance drops off significantly once the software is proven and stable. After that, you're paying for genuine changes: new features, new connections, new business needs. Growth creates maintenance costs, which is the opposite of a problem.

Next step

The real number for your situation depends on your specific system. A CRM for five users has different maintenance needs than an automated fulfillment system managing hundreds of transactions daily. That's why Sierra starts every project with a free scoping call. During that conversation, you can ask about long-term support and get a realistic sense of what ongoing maintenance would actually cost for your use case. The team can also discuss support options—whether that's retainer hours, pay-as-you-go, or another arrangement that matches your budget.