You have a website that runs fine, a stable internal system, and you pay nothing for outside operations support. Sounds economical. But if you actually add it up at year-end, most business owners get a shock: that "saving" is far more expensive than the zero on the invoice.

The problem is that these costs never arrive as a bill you can see. They hide in payroll, in missed revenue, in the sleepless nights when the system goes down. Here are the costs you're already paying without realizing it.

Staff time pulled into technical work

This is the biggest hidden cost and the one almost nobody tracks. You hire a strong marketer, but every week they lose a few hours "fiddling" with the website. Fixing display bugs, updating plugins, compressing heavy images that slow the page. You hire an IT generalist, but really they're half system-admin, half their actual job.

Do the math: a staff member on 15 million VND/month who loses 5 hours a week to minor technical chores. That's around 20 hours a month, over 1.7 million VND of salary "leaking" into work outside their expertise, not counting the real work that stalls. Multiply by twelve months and it adds up. Worse still: talented people tend to hate menial work outside their role, and that's a quiet reason they leave.

Downtime. Every minute down is an order lost

The site crashes at 2 a.m. on Saturday. Nobody notices until 9 a.m., when a customer calls to complain. For those seven hours, every visitor hit an error and left.

If the website brings in an average of 30 million VND/month, roughly 1 million a day. Then a half-day incident that goes undetected can cost 400,000, 500,000 VND in direct revenue. But the real damage is larger: customers who hit an error rarely come back, and if you're running ads, the ad spend keeps flowing while the landing page is dead. Running in-house means nobody watches the system outside office hours. And incidents don't pick convenient times.

Security and data-loss risk

This is the "rare but brutal when it hits" kind of cost. One outdated plugin, one unpatched vulnerability, one weak admin password. And one day your site is injected with malware, redirected to a gambling page, or your entire customer database is encrypted and held for ransom.

The most important question at that moment is: "When was the last backup?" Many in-house teams answer that question with silence. Backups may have quietly stopped long ago, or were never test-restored so nobody knows if they even work. The cost isn't there on normal days, it's on the day you need to restore and discover there's nothing to restore.

Technical debt that piles up quietly

Every "quick fix to keep it running" is a loan. The hurried patch, the patched-together code, the outdated software version you're afraid to update in case it breaks. It all accumulates into technical debt.

This debt doesn't call in right away, but the interest compounds. At first it's just a slightly slow page. Six months later, adding a small feature takes three times as long because the system is tangled. By the time an upgrade is unavoidable, the cost is no longer a few work sessions but a full rebuild project. Steady operations and on-schedule updates are how you pay this debt down before it balloons.

The cost of hiring and keeping technical staff

Say you decide to do it "properly" and hire a dedicated in-house operations engineer. An experienced DevOps/sysadmin in Vietnam typically costs 20, 35 million VND/month, before insurance, bonuses, recruiting costs, and onboarding time.

But here's the paradox: for a small or mid-sized business, the actual operations workload isn't enough to keep one person busy full-time. You pay a full-time salary for someone whose real work fills only 20, 30% of their hours. The rest is waiting for incidents. And when that person leaves, all the operational knowledge walks out with them, and you're back to square one.

The bottom line: zero on the invoice doesn't mean free

Add up all five. Staff time, revenue lost to downtime, security risk, technical debt, and dedicated-staff cost. And "doing it yourself" is usually far more expensive than a fixed monthly subscription. The only difference is that you don't see it until something breaks.

If you've never sat down and calculated the real number for running things in-house, it might be time to. Siri9 offers a free audit: we do a quick review of your backup status, security, speed, and risk points, then show you exactly which hidden costs are lurking. No strings, no sales pitch. At the very least, you'll know what you're actually paying.