How much does it cost to run a SaaS in 2026?

When I was starting out I googled this exact question and the answers ranged from "five dollars a month" to "you'll need funding". Both are technically true and neither is useful, because the real answer depends on one thing: what stage you're at.

So here's the breakdown the way I wish someone had given it to me. Three stages, real numbers, and at the end the costs that never make it into anyone's budget but always make it onto the credit card statement.

Quick note on where these numbers come from: they're what we pay (or paid) to run StackMemo, rounded a little so they don't go stale next month. Your bill will differ, but probably not by much. The shape of the curve is the same for everyone.

Stage one: you're still building it

Count on about a dollar a month.

A SaaS that nobody uses yet is nearly free to run in 2026. The free tiers are genuinely good now:

• Hosting: free or a few dollars on the starter tiers of Koyeb, Railway, Vercel and friends
• Database: free (Neon and Supabase both scale to zero when idle, and your database is idle, because you have no users)
• Auth, code hosting, CI: free
• Transactional email: free (you're sending maybe ten password resets a month, to yourself)

The only thing you actually have to pay for is the domain, around $12 a year. That's your dollar a month.

The catch is that at this stage you're not spending money, you're spending evenings and weekends. Which is exactly how it should be. If your idea dies (most do, mine have), it dies costing you a domain renewal and some sleep.

Stage two: launched, a few hundred users

Now you're in the $25 to $80 a month range.

This is where the free tiers start tapping you on the shoulder. Not all at once, which is sneaky. One month your hosting needs the $20 tier because the free instance keeps going to sleep mid-request. A couple months later your database follows. Then you want real analytics, that's $9. Then email verification for signups pushes you past the free email quota.

A typical bill at this stage looks something like:

Thing	Monthly
Hosting	$10-20
Database	$0-19
Email	$0-15
Analytics	$9
Domain	~$1
Payments	~3% of revenue, so basically $0

None of these hurt on their own. That's sort of the problem. Each upgrade is a small, reasonable decision, and six small reasonable decisions later the total has doubled without any single moment where you decided to spend more.

Stage three: real traffic, real revenue

Somewhere between $150 and $600 a month, and it finally correlates with income.

The good news about this stage is that if you got here, your revenue should be comfortably ahead of your costs. The bills that grow now mostly grow because usage grew:

• Hosting and database move to proper production tiers, $50-150 combined
• Stripe's cut scales with revenue, which is the one bill you're happy to see increase
• You start paying for things you skipped before: error tracking, uptime monitoring, maybe a support inbox tool

And then there's the new line item that didn't exist a few years ago: the AI bill. If your product has any AI feature at all, you're paying a usage-based API bill, and usage-based is a polite way of saying unpredictable. It can be $5 one month and $80 the next because one power user found the feature. In 2026 this is the fastest-growing line on most indie SaaS bills I've seen, and the one people forget to watch until it outgrows their hosting.

The costs nobody budgets for

This is the section I actually wanted to write, because the monthly stuff above is the easy part. The bills that get you are the ones with worse timing:

Annual renewals. The domain, the yearly plan you bought because it was 20% cheaper, the code signing certificate. They bill once a year, precisely when you've forgotten they exist. A $90 annual renewal in a quiet month feels worse than $9 twelve times.

Free tier cliffs. Some tools go from $0 straight to $99 a month with nothing in between. Perfectly fine tool, ruinous first paid tier for a project earning $30 a month. Always check the first paid tier before you build on the free one, because that's the real price.

Zombie subscriptions. Small confession: I once paid for a logo design tool for 14 months after abandoning the project I bought it for. It was $7 a month, small enough to never quite be worth the cancellation effort in the moment. That's $98 for a logo that lives in a dead repo. Multiply by every side project you've ever paused and this category is probably your biggest hidden cost.

The month everything lands at once. Your costs aren't really $40 a month, they're $25 most months and $130 in March when the domain, the annual plan and the AI overage all hit together. If you only ever look at one month, you don't know your real number.

So what's the actual answer?

For a side project SaaS in 2026: roughly free while you build, $25-80 a month once you've launched, a few hundred once it's working, plus an annual layer of renewals that's easy to forget and an AI line that's easy to underestimate.

Oh, and one more that almost nobody counts: the AI subscriptions you use to build the thing. The coding assistant, the $20 chat plan, maybe both. They feel like personal expenses because they follow you from project to project, but be honest, would you keep paying for them if you stopped building? That's $20-100 a month of tooling that belongs in the total, and I've never once seen it in someone's "my SaaS costs $12 a month" breakdown.

But the number matters less than knowing your number, especially once you have more than one project and the zombie subscriptions start piling up. That's the itch that made us build StackMemo, one page per project with its services, costs, renewal dates and revenue, so the question "is this thing making or losing money" has an actual answer instead of a shrug.

However you do it, in a tracker, a spreadsheet, or a note on your phone, write your number down. Future you, staring at a surprise renewal in March, will be grateful.