AWS Mastery for .NET Architects
Lesson 29 of 30 97% of course

Cost Optimization (FinOps): Reducing your monthly AWS bill

17 · 8 min · 5/23/2026

Sign in to track progress and bookmarks.

Mastering FinOps

Cloud cost is a first-class architectural concern. A great .NET architect doesn't just build fast apps; they build Cost-Efficient apps.

1. Savings Plans vs Reserved Instances

If you know you'll be using EC2 or Fargate for the next year, don't pay the 'On-Demand' price. Commit to a **Compute Savings Plan** and save up to 72% instantly. It's the easiest way to slash your bill without changing code.

2. Rightsizing

Use **AWS Compute Optimizer**. It analyzes your CloudWatch metrics and tells you if your .NET instances are over-provisioned. If your M5.large is only using 5% CPU, move it to a T3.medium. Architecture is about efficiency.

3. Data Transfer Costs

The 'Silent Killer'. Transferring data between AWS Regions or out to the public internet is expensive. **Solution:** Use **CloudFront** (which has lower data-out rates) and keep your traffic within the same Availability Zone whenever possible by using **VPC Endpoints**.

3. Architect Insight

Q: "How do I implement developer accountability for costs?"

Architect Answer: "Use **Tagging**. Every resource must have a 'CostCenter' and 'Project' tag. You can then use **AWS Cost Explorer** to see exactly which team is spending the most money and why. Visibility is the best driver for responsible architecture."

Test your knowledge

Quizzes linked to this course—pass to earn certificates.

Browse all quizzes
AWS Mastery for .NET Architects

On this page

1. Savings Plans vs Reserved Instances 2. Rightsizing 3. Data Transfer Costs 3. Architect Insight
1. AWS Global Infrastructure
AWS Foundations: Regions, Availability Zones, and Edge Locations VPC Deep Dive: Subnets, Route Tables, and Internet Gateways IAM (Identity and Access Management): The Principle of Least Privilege Security Groups vs Network ACLs: Handling traffic for .NET apps
2. Compute for .NET
EC2 (Elastic Compute Cloud): Choosing the right instance for C# apps AWS Lambda: Serverless .NET with Native AOT ECS & Fargate: Containerizing .NET APIs at scale Auto Scaling Groups: Handling spikes in traffic
3. Storage & Databases
S3 (Simple Storage Service): Architecting a binary storage layer RDS (Relational Database Service): Managed SQL Server in the cloud DynamoDB Mastery: NoSQL for extreme scale ElastiCache: Boosting performance with Redis/Memcached
4. Networking & Content Delivery
Route 53: DNS management and health checks Application Load Balancer (ALB) vs Network Load Balancer (NLB) CloudFront: Accelerating frontend delivery via CDN API Gateway: Building a unified entry point for Microservices
5. Security & Compliance
AWS WAF: Protecting your APIs from common web attacks AWS Secrets Manager: Managing connection strings securely KMS (Key Management Service): Data encryption for .NET CloudTrail: Auditing your infrastructure changes
6. Messaging & Events
SQS (Simple Queue Service): Decoupling .NET services SNS (Simple Notification Service): Pub/Sub patterns in AWS EventBridge: Building an event-driven bus Step Functions: Orchestrating complex serverless workflows
7. Monitoring & DevOps
CloudWatch: Metrics, Logs, and Alarms for C# apps X-Ray: Distributed tracing for .NET Microservices AWS CodePipeline: CI/CD for .NET on AWS CloudFormation & CDK: Infrastructure as Code (IaC) with C#
8. Optimization & Scale
Cost Optimization (FinOps): Reducing your monthly AWS bill Case Study: Migrating a legacy Monolith to a Cloud-Native AWS stack