The Hidden Cost of Building Software Too Quickly
Every project has a deadline, and most owners wanted the software yesterday. Speed is good. Shipping something useful in weeks instead of months is often the right call.
Rushing is something else. Rushing means skipping the work you can’t see in a demo: tests, clear structure, security and notes for the next person. The software looks finished. The bill for what was skipped arrives later, usually when you can least afford it.
Written for Owners, founders and public-sector managers paying for software, and anyone living with an application that gets harder to change every month.
The short answer
- Fast means building less. Rushed means building the same amount carelessly.
- Skipped work becomes technical debt: shortcuts you repay later, with interest.
- Automated tests are the cheapest insurance in software. Ask whether your project has them.
- Small, frequent releases are faster over a year than one big launch.
- Security added at the end costs more and protects less.
Fast and rushed are different
A fast project builds less. A rushed project tries to build everything by the same date.
A fast project picks the one feature that matters, builds it properly and ships it. A rushed project keeps the whole list and the same date, so something has to give. What gives is almost always the work nobody sees.
Think about building a house. You can build a small house quickly and well. You can also build a big house quickly by skipping the inspections and pouring the foundation in the rain. Both are finished on time. Five years later, only one of them has doors that still close.
What technical debt means
Technical debt is the cost of shortcuts. Each one saves a day now and costs more later.
A developer copies the same code into five places instead of writing it once. A quick fix gets stacked on another quick fix. Nobody writes down how the system works. Each of those shortcuts saves time this week.
The programmer Ward Cunningham came up with the name in 1992, comparing shortcuts in code to borrowing money. The comparison holds up. Some debt is smart, the way a business takes a loan for a truck that starts earning right away. A startup may cut corners on purpose to test an idea before the money runs out.
The trouble is debt nobody chose and nobody tracks. You pay the interest in slower changes, more bugs and developers who are afraid to touch parts of the code. We treat debt as a financing decision: take it on deliberately, write it down, and plan when you’ll pay it back.
What rushing costs over time
Rushed software is cheap to change at first. Then the skipped work catches up.
Rushed software is cheaper to change at first. The skipped work catches up, and each change gets more expensive. Incremental development costs a little more at the start and stays steady. An illustration of a common pattern, not measured data.
| Stage | Rushed | Incremental |
|---|---|---|
| First release | Sooner, with more features | Soon, with fewer features |
| Each change after launch | Takes longer every month | Stays about the same size |
| Bugs | Found by customers | Mostly caught by tests |
| Security | Added after something goes wrong | Built in from the start |
| Two years later | Talk of a rewrite | Still growing |
The crossing point is where most owners first notice something is wrong. A change that took a day now takes a week. Fixing one bug causes another. Eventually someone suggests starting over, which is usually the most expensive option of all. Our article on whether to rewrite your application explains why, and what to do instead.
Why testing matters
Tests are what keep a project fast in its second year.
A test is a small program that checks whether part of your software still works. If your software works out sales tax, a test feeds it a known order and checks the answer. Good software has hundreds or thousands of these, and they run automatically, in minutes, every time a developer changes something.
Without tests, the only way to know a change didn’t break something is for a person to click through everything. Nobody has time for that, so it doesn’t happen, and customers find the bugs instead.
Tests feel slow in the first month. After that, they let developers change the code without fear, which is what keeps changes small and cheap.
Maintainability: can the next person change it?
Maintainable software is easy for someone else to understand and change. That someone might be a new developer, or the same developer a year later who has forgotten the details.
The signs of maintainable software are dull, and that’s a good thing. Names that say what things are. The same problem solved the same way everywhere. Short notes explaining the odd decisions. A written guide to setting it up. Clever code that only its author understands is a risk, however impressive it looks.
Security is the first thing a rushed project skips
Good security work is invisible, so it’s easy to put off. The usual shortcuts: everyone gets full admin access because setting up roles takes time, passwords and keys are saved inside the code, the building blocks the software uses never get updated, and nobody checks who can see whose data.
Each of those is cheap to get right at the start and expensive to fix after something goes wrong. Public agencies, and any business handling health, payment or personal information, usually have security requirements written into rules or contracts. Plan for them from the first week.
Small releases: the safer way to move fast
Release small pieces often, every week or two, instead of one big launch after months.
When only a little changed, a mistake is small and easy to find. You hear from real users early, while changing direction is still cheap. And you can stop at any point and still have something that works.
- Pick one piece
Small enough to finish in a week or two.
- Build it with tests
The tests ship with the feature, not later.
- Review
A second person reads every change before it goes live.
- Release
Ideally an automated step, not a late-night manual one.
- Watch and learn
Check how it’s used. That decides the next piece.
Lessons from leading engineering teams
- Surprises are cheapest in week one. A problem found while planning costs a conversation. The same problem found after launch can cost a project.
- When the date is fixed, cut scope, not quality. Decide what to leave out, and keep the tests and the security work.
- Write decisions down. Six months later nobody remembers why something was built a certain way. A short note saves days of digging.
- Pay down debt a little at a time. Setting aside some time in every cycle for cleanup is much cheaper than a big rescue later.
Questions to ask your developer or vendor
Ask these before the deadline is set
- What will you leave out of the first release to hit the date?
- Do you write automated tests, and do they run on every change?
- How often will we get a working release we can try?
- Where are passwords and keys stored, and who has admin access?
- If you left tomorrow, could someone else take over? What’s written down?
- Which shortcuts are you taking, and when will we pay them back?
When to get help
If your software already shows the signs, such as slow changes, recurring bugs, or one person who is afraid to touch it, a short review is the cheapest next step. It tells you what is risky, what can wait and what to fix first.
Yippify reviews and modernizes existing applications in small steps, while they keep running. If the person who built yours has moved on, see what to do when the developer leaves.
Frequently asked questions
What is technical debt in simple terms?
Technical debt is the future cost of shortcuts taken while building software, such as skipped tests, copied code or missing documentation. Like a loan, it lets you move faster now, and you pay it back later with interest: slower changes, more bugs and more risk. Some debt is a sensible choice. Debt nobody chose or tracks is the expensive kind.
Is it ever OK to build software quickly?
Yes. Moving quickly by building less is often the right call. The trouble comes from building the same amount in less time, which forces the team to skip testing, security and documentation. When a deadline is fixed, cut features, not quality.
How can I tell if my software was rushed?
Common signs: small changes take weeks, fixing one bug causes another, nobody wants to touch certain parts, there are no automated tests, only one person can release changes, and security updates are far behind. Any one of these is worth a review. Several together usually mean significant technical debt.
Do automated tests make a project more expensive?
They add some time at the start. Over the life of the software they usually save more than they cost, because they catch mistakes in minutes instead of letting customers find them, and they let developers change the code without fear of breaking something.
Living with software that was built in a hurry?
Tell us what the software does and what happens when you try to change it. We’ll look at the code, the tests and the security, and tell you what to fix first and what can wait.
- A plain list of the real risks
- Fixes in small, safe steps
- No rewrite unless it truly pays
A rough description is enough to start. No specification needed.