Micro-SaaS Stack Cost Calculator
Free solo founder tool stack cost calculator. Add up monthly build, hosting, and ops spend so you know what your toolchain burns before revenue — and how many customers cover it.
What is a micro-SaaS stack cost calculator?
A stack cost calculator adds up the monthly software bill that keeps your product running: builders, editors, model APIs, hosting, database, email, and the odds and ends that show up on your card statement. It answers a simple question solo founders avoid — what does this toolchain burn before a single stranger pays?
This micro SaaS stack cost calculator is built for bootstrapped operators, not enterprise procurement. Defaults mirror a realistic non-developer setup around eighty-seven dollars a month. Swap the numbers for your own invoices. The goal is a clear monthly and annual total, plus how many customers at your price cover the tools alone.
How to use this calculator
Enter what you actually pay each month for AI builders, your editor, model access, hosting, database and auth, email and domain, analytics, and anything else. Leave free-tier tools at zero. Optionally add current MRR so you can see stack cost as a percent of revenue.
Set your subscription price to see how many paying customers cover the toolchain before living expenses. Copy the link to save a scenario or share it with a co-founder who keeps adding tabs.
Pair this with the build path picker when you are still choosing Bolt vs Cursor vs Expo, and with the runway calculator when you want stack burn inside total monthly expenses.
Why solo founders need stack math
Tool sprawl feels like progress. A second AI subscription, a nicer analytics plan, a VPS you barely SSH into — each charge is small. Together they eat the same cash that would fund another month of customer interviews. Seeing eighty-seven dollars as three customers at twenty-nine dollars reframes the shopping list.
Cut tools you have not opened in thirty days before you cut marketing. Keep the layers you can explain out loud: UI, data, money. Everything else is optional until revenue says otherwise. Fixed stack cost is cheap compared to building the wrong product — but it is not free, and it compounds quietly every renewal.
Frequently asked questions
How much should a micro-SaaS stack cost per month?
Many solo founders land between $50 and $150 per month before Stripe fees — an AI builder, an editor, model access, hosting, and email. Free tiers for database and analytics keep the bill lower while you validate. The expensive mistake is six overlapping AI subscriptions, not a $12 VPS.
How do I calculate solo founder tool stack cost?
List every paid tool you open at least monthly. Add AI builder, editor, model usage, hosting, database, email, analytics, and anything else. Sum the monthly amounts for your stack burn, multiply by twelve for annual cost, then compare that burn to MRR and to how many customers at your price cover the tools alone.
What percent of MRR should tools take?
Under 15% of MRR is comfortable for most bootstrapped products. Crossing 30% usually means you are oversubscribed relative to revenue — cut unused seats, drop duplicate AI tools, or raise price before you add another tab. Early pre-revenue stacks are a fixed burn against savings, not a ratio.
Should I include Stripe fees in stack cost?
No. Stripe fees scale with revenue; this calculator tracks fixed and near-fixed software spend. Estimate processing fees separately with a Stripe fee calculator once you have a price and customer count.