How to Estimate Deployment Costs for a Small SaaS
Cloud costs are a business expense, not a technical detail. If your hosting bill exceeds your revenue, you do not have a business — you have an expensive hobby. This article is the founder's guide to estimating deployment costs, with real numbers for different platforms and traffic levels, so you can make an informed decision before you commit.
The direct answer is that deployment costs depend on three factors: the pricing model (usage-based vs. fixed), the traffic level (low, medium, high), and the platform's features (what is included vs. what is extra). By understanding these three factors, you can estimate your monthly cost and avoid surprise bills. For more on platform selection, see our article on how to choose a PaaS for a full-stack SaaS.
The Three Pricing Models
1. Usage-based pricing (Vercel, Netlify, AWS)
You pay for what you use: per request, per GB-second, per build minute. This is cheap for low-traffic apps (you pay almost nothing) but expensive for high-traffic apps (a viral spike can produce a $400 bill).
Best for: Low-traffic apps, prototypes, hobby projects.
Worst for: High-traffic apps, apps with unpredictable traffic, apps where a surprise bill would be devastating.
2. Fixed pricing (Deployxa)
You pay a fixed monthly fee per app (or per batch of apps), regardless of traffic. This is more expensive for low-traffic apps (you pay even when there is no traffic) but predictable for high-traffic apps (the bill is the same whether you handle 1 request or 1 million).
Best for: Production SaaS apps, apps with predictable traffic, founders who want budget certainty.
Worst for: Hobby projects, apps with very low traffic.
3. Self-hosted pricing (VPS + Coolify/Dokku)
You pay for a VPS ($5-20/month) and manage the infrastructure yourself. The VPS cost is fixed, but the maintenance time (4-8 hours/month) is a hidden cost. If you value your time at $50/hour, the true cost is $200-400/month.
Best for: Teams with DevOps expertise, teams with strict data sovereignty requirements, hobby projects where maintenance is part of the fun.
Worst for: Founders who want to focus on their product, teams without DevOps expertise.
Real Cost Calculations
Scenario 1: Low-traffic SaaS (100 requests/day)
| Platform | Monthly Cost | Notes |
|----------|-------------|-------|
| Vercel (free tier) | $0 | 100GB bandwidth, 100K function calls included |
| Deployxa (free tier) | $0 | 3 apps, 512MB RAM included |
| VPS + Dokku | $5 + time | VPS cost + maintenance time |
Winner: Tie (Vercel and Deployxa are both free).
Scenario 2: Medium-traffic SaaS (10,000 requests/day)
| Platform | Monthly Cost | Notes |
|----------|-------------|-------|
| Vercel (Pro) | $20 + overages | $20/user/month + usage-based overages |
| Deployxa (paid) | $9 | 15 apps, unlimited requests |
| VPS + Dokku | $10 + time | Larger VPS + maintenance time |
Winner: Deployxa ($9 vs. $20+).
Scenario 3: High-traffic SaaS (1 million requests/day)
| Platform | Monthly Cost | Notes |
|----------|-------------|-------|
| Vercel (Pro) | $200-500+ | Usage-based: bandwidth, function calls |
| Deployxa (paid) | $9 | Fixed pricing, no overages |
| VPS + Dokku | $40 + time | Multiple VPS + maintenance time |
Winner: Deployxa ($9 vs. $200-500+).
Scenario 4: Fleet of 10 SaaS apps
| Platform | Monthly Cost | Notes |
|----------|-------------|-------|
| Vercel (Pro) | $200+ | $20/user/month per app |
| Deployxa (paid) | $9 | 15 apps included |
| AWS ECS | $200-500 | Fargate + ALB + NAT + bandwidth |
| VPS + Dokku | $20-40 + time | VPS cost + maintenance time |
Winner: Deployxa ($9 vs. $200+). For more on fleet costs, see our article on why indie hackers are moving their micro-SaaS fleets from AWS to Deployxa.
Hidden Costs to Watch For
Bandwidth
Some platforms (AWS, GCP) charge for egress bandwidth (data leaving the platform), which can be significant for high-traffic apps. Deployxa does not charge for bandwidth. For more, see our article on Deployxa vs AWS ECS.
Build minutes
Some platforms (Vercel, Netlify) charge for build minutes, which can add up if you deploy frequently. Deployxa does not charge for build minutes. For more, see our article on the build cache architecture.
Database
Managed databases (Supabase, Neon, Railway) have their own pricing, separate from the hosting platform. Budget $0-25/month for a small database. For more on database setup, see our article on fixing DATABASE_URL not set.
CDN
CDNs (Cloudflare, CloudFront) have their own pricing, though Cloudflare's free tier is sufficient for most small SaaS apps. Deployxa includes Cloudflare CDN at no extra cost. For more, see our article on the CDN configuration gap.
Transactional email services (Resend, Postmark, SendGrid) charge per email. Budget $0-20/month for a small SaaS.
Monitoring
External monitoring services (Uptime Robot, Sentry) have free tiers that are sufficient for small SaaS apps. Budget $0-20/month if you need premium features. For more on monitoring, see our article on monitoring your SaaS without hiring a DevOps engineer.
The Total Cost of Ownership
The total cost of ownership (TCO) includes not just the platform cost but also the hidden costs (maintenance time, database, CDN, email, monitoring):
| Component | Monthly Cost |
|-----------|-------------|
| Platform (Deployxa) | $9 |
| Database (Supabase) | $0-25 |
| Email (Resend) | $0-20 |
| Monitoring (Uptime Robot) | $0 |
| Domain (Namecheap) | $1 |
| Total | $10-55 |
For a small SaaS with 100-1000 users, the total monthly cost is $10-55, which is very affordable. For more on TCO, see our article on self-hosting vs managed PaaS.
Common Pitfalls and Troubleshooting
The first pitfall is not estimating costs before committing. Many founders choose a platform based on the free tier, without considering what happens when they exceed it. The fix is to estimate costs at your expected scale (not just the free tier). The second pitfall is not considering hidden costs. The platform cost is just one component; databases, email, monitoring, and domains add up. The fix is to calculate the total cost of ownership. The third pitfall is choosing usage-based pricing for a high-traffic app. Usage-based pricing can produce surprise bills. The fix is to choose fixed pricing (Deployxa) for high-traffic apps. The fourth pitfall is not monitoring costs. Cloud costs can creep up over time. The fix is to set up cost alerts and to review costs monthly. The fifth pitfall is over-provisioning. Many founders choose a larger plan than they need. The fix is to start with the smallest plan that works and to scale up when needed. For more on right-sizing, see our article on the cost optimization engine.
Conclusion: Know Your Costs Before You Commit
Deployment costs are a business expense, not a technical detail. By understanding the three pricing models (usage-based, fixed, self-hosted), calculating the real costs at your expected traffic level, and accounting for hidden costs, you can make an informed decision and avoid surprise bills. For most small SaaS apps, Deployxa's fixed pricing ($9/month for 15 apps) is the most predictable and cost-effective choice.
Ready to estimate your costs? Use the scenarios above to calculate your expected monthly cost, then try Deployxa Drop for a zero-signup proof of concept. For more, see how to choose a PaaS for a full-stack SaaS and self-hosting vs managed PaaS. Explore our free developer tools to speed up your workflow.