Rock runs around the clock, so both your web server and database are steady-state, always-on workloads — the ideal case for a Reserved Instance (RI). Once you've confirmed your sizes work (give it a week or two on On-Demand first), reserving them can cut those two line items dramatically versus the monthly On-Demand rate.
Reserve both pieces:
- EC2 web server (your
t3.medium Windows host) — up to ~72% off On-Demand on a 3-year term. The Windows platform is included, so set the RI's platform to Windows.
EC2 Reserved Instances (docs)
· EC2 RI pricing
- RDS database (your
db.t3.small SQL Server instance) — up to ~69% off On-Demand in steady state. Note: for SQL Server the reservation is locked to the exact instance size (no size flexibility), and storage/backup are billed separately.
RDS Reserved DB Instances (docs)
· RDS pricing
Terms & payment: RIs come in 1-year or 3-year terms with No Upfront, Partial Upfront, or All Upfront payment (more upfront = bigger discount). A 1-year No Upfront RI has no lump-sum cost and still saves meaningfully — an easy first step for a small-church budget.
Newer alternative — Savings Plans.
Compute / EC2 Instance Savings Plans
discount EC2 (up to ~66–72%) with more flexibility than RIs. As of December 2025 the new
Database Savings Plans
also cover RDS (up to ~35%, 1-year, no upfront). Because SQL Server Express is free-licensed, the "license billed separately" caveat costs you nothing here. Compare RI vs. Savings Plan for your exact instances before you buy.
Estimate with AWS Pricing Calculator
Savings Plans overview
Discount percentages are AWS's published headline figures and vary by instance type, region, and term — confirm yours in the Pricing Calculator or in AWS Cost Explorer's RI/Savings Plan recommendations.