App Maintenance Costs: What to Budget After Launch
Launching an app feels like the finish line, but financially it is closer to the start. Operating systems change every year, libraries go out of date, users report bugs and cloud bills arrive every month. A realistic app maintenance cost is usually 15–25% of the original build cost per year, plus hosting and third-party fees that scale with usage. For an app that cost $80,000 to build, that means planning for roughly $12,000–$20,000 a year before any new features.
This guide explains where that money goes, how to estimate it for your own product, and how to stop maintenance from quietly eating your roadmap budget. If you are still estimating the initial build, start with our mobile app development cost breakdown and come back here for the post-launch picture.
What App Maintenance Actually Covers
App maintenance is all the work needed to keep a launched app working, secure and compliant, excluding new features. “Maintenance” is a vague word, and vague words lead to arguments with vendors. It helps to split the work into five categories, because each one is budgeted differently.
- Corrective maintenance. Fixing bugs reported by users, crash reports and edge cases that testing missed. This is highest in the first three to six months after launch.
- Adaptive maintenance. Keeping the app working as the world changes around it: new iOS and Android versions, new device screen sizes, deprecated APIs, payment gateway changes and updated store policies.
- Preventive maintenance. Upgrading frameworks and dependencies, patching security vulnerabilities, refactoring fragile code and improving test coverage before problems surface.
- Perfective maintenance. Small improvements driven by analytics and feedback: tweaking onboarding, speeding up slow screens, adjusting copy.
- Operations. Monitoring, backups, server patching, incident response and keeping cloud infrastructure healthy.
New features are not maintenance. Keep them on a separate budget line, otherwise every enhancement request will look like a maintenance overrun.
Typical App Maintenance Cost by App Size
| App profile | Typical build cost (USD) | Yearly maintenance (USD, excluding hosting) | Typical effort |
|---|---|---|---|
| Simple app (content, forms, basic login) | $15,000 – $40,000 | $3,000 – $8,000 | A few days per month |
| Mid-complexity app (payments, chat, admin panel) | $40,000 – $120,000 | $8,000 – $25,000 | Part-time developer plus QA |
| Complex app (marketplace, real-time, many integrations) | $120,000 – $300,000 | $25,000 – $70,000 | One to two dedicated engineers |
| Regulated app (fintech, health, enterprise) | $150,000+ | $40,000 – $100,000+ | Dedicated team plus security reviews |
The percentage tends to fall as a product matures and the code stabilizes, but it rarely drops below 10–15% for an app that is actively used. Products with many third-party integrations sit at the upper end, because every integration is something that can change without warning.
The Recurring Fees Many Budgets Forget
Engineering time is only part of the bill: store fees, hosting and usage-based services often add hundreds to thousands of dollars a month. These running costs are easy to miss in a first-year budget:
- App store accounts. The Apple Developer Program costs $99 per year. Google Play charges a one-time $25 registration fee. Enterprise and organization accounts can have additional requirements.
- Cloud hosting. Servers, managed databases, file storage, CDN and bandwidth. A small app may run for $50–$300 a month; a busy marketplace can easily spend several thousand.
- Third-party services. Maps, SMS and OTP, email delivery, push notifications at scale, analytics, crash reporting, search and video. Most are usage-based, so costs grow with success.
- Payment processing. Gateway fees and, for digital goods sold in-app, the platform commission charged by Apple and Google.
- AI model usage. If your app calls an LLM API, token costs are a direct function of traffic and prompt size.
- Licences and certificates. Commercial SDKs, design tool seats, SSL certificates (often free now, but not always) and domain renewals.
Why Mobile Apps Cannot Simply Be Left Alone
Mobile apps need regular updates because Apple and Google change their platforms and store rules every year. Web apps can sometimes run untouched for years. Mobile apps cannot, mainly because the platforms move on whether you do or not.
Annual OS releases
Apple and Google ship major OS versions every year, typically with new permission rules, privacy prompts and UI behaviors. Each release usually needs a round of testing and fixes, and sometimes changes to how you request location, notifications or background activity.
Store requirements
Google Play requires app updates to target a recent Android API level, generally within about a year of the latest release, and Apple periodically requires submissions to be built with a recent Xcode and SDK. If you fall behind, you cannot ship updates, including urgent bug fixes, until the app is upgraded. Both stores also update their privacy disclosure requirements and the App Store Review Guidelines, which can require code or policy changes.
Dependency and framework drift
Apps built with Flutter or React Native rely on dozens of open-source packages. Skip upgrades for two years and you face a large, risky migration instead of a series of small ones. Steady, scheduled upgrades are almost always cheaper.
Security patches
Vulnerabilities are discovered in libraries, servers and operating systems constantly. A neglected backend is one of the most common routes to a data breach, and the OWASP Mobile Top 10 is a useful checklist of the risks to review. Our guide to mobile app security best practices covers what to check regularly.
How to Estimate Your Own App Maintenance Cost
A simple bottom-up estimate is more reliable than a flat percentage. Work through these steps:
- Count your moving parts. Platforms (iOS, Android, web), backend services, admin panels and third-party integrations. Each adds a slice of upkeep.
- Estimate engineering hours per month. For a mid-size app, 30–80 hours a month covering fixes, upgrades and monitoring is common in year one.
- Add the annual OS cycle. Budget one to three weeks of effort each year for major iOS and Android updates.
- Price your infrastructure and services at current usage, then model what happens at 3x and 10x users.
- Decide your service level. Business-hours support costs far less than a 24/7 on-call rota with a one-hour response time.
- Add a 10–15% contingency for surprises such as a payment provider deprecating an API.
Choosing a Maintenance Model
Most businesses buy maintenance as a monthly retainer, pay-as-you-go hours or a dedicated developer. Each suits a different stage:
- Monthly retainer. A fixed bucket of hours each month for fixes, upgrades and monitoring. Predictable and good for stable products. Agree upfront what happens to unused hours.
- Pay as you go. Hourly billing when something breaks. Cheap for very simple apps, but risky because nobody is doing preventive work.
- Dedicated developer. A full-time engineer who maintains the app and also ships improvements. Often the best value once your app is a core part of the business. You can hire a dedicated Android developer or iOS specialist on a monthly basis.
Whatever model you choose, insist on a written scope: response times, what counts as a bug versus a change request, who handles store submissions, and how security issues are escalated.
Seven Ways to Keep Maintenance Costs Down
- Invest in automated tests. They make every upgrade faster and safer. See our guide to mobile app testing.
- Use a cross-platform framework where it fits, so fixes are made once rather than twice.
- Keep dependencies lean. Every package you add is something you will need to upgrade.
- Upgrade little and often instead of in painful multi-year jumps.
- Set up crash reporting and monitoring so you fix the issues that actually affect users.
- Review cloud spend quarterly. Idle servers and oversized databases are common waste.
- Document the system. Good README files, architecture notes and CI/CD pipelines reduce the cost of onboarding anyone new.
Frequently Asked Questions
How much does it cost to maintain an app per month?
For a small to mid-size app, engineering upkeep commonly falls between $500 and $2,500 a month, plus hosting and third-party services. Complex or regulated apps can need $4,000 or more per month.
Is app maintenance included in the development price?
Usually only a short warranty period, often 30–90 days, for fixing defects in delivered work. Ongoing maintenance is normally a separate agreement, so check your contract.
What happens if I stop maintaining my app?
It will gradually break on new OS versions, you may be unable to publish updates because of store targeting rules, and unpatched security issues accumulate. Restoring a long-neglected app often costs more than steady maintenance would have.
Can a different company maintain an app we built elsewhere?
Yes. A new team typically starts with a code audit of one to two weeks to understand the architecture, dependencies and risks before taking over day-to-day support.
Plan Your Post-Launch Budget with Confidence
Sigmato maintains and improves mobile applications and web platforms from our engineering centre in Bengaluru and our UK office. Share your app and we will outline a maintenance plan with a clear scope and an indicative monthly figure.
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