Cost Estimate

Generated: 2026-04-14 Region: swedencentral Environment: Development Architecture Reference: 02-architecture-assessment

Cost At-a-Glance

Monthly Total: ~$154.87 | Annual: ~$1,858.44

Metric	Value
Budget	EUR 100-500/month (soft) — Utilization: ~31% of $500
Cost Trend	➡️ Stable (fixed App Service Plan dominates)
Savings Available	1-year RI on App Service could save ~36% on compute
Compliance	✅ GDPR-aligned (swedencentral, EU-only data residency)

Decision Summary

• ✅ Approved: App Service S1 + ACR Premium + Table Storage LRS + Key Vault Standard + Private Endpoints + Private DNS Zones
• ⏳ Deferred: CDN/Front Door, CI/CD pipeline, alerting
• 🔁 Redesign Trigger: If traffic exceeds 10K daily users or data > 10 GiB, revisit storage tier and App Service scaling

Confidence: Medium | Expected Variance: ±15%

Requirements → Cost Mapping

Requirement	Architecture Decision	Cost Impact	Mandatory
99.0% SLA	App Service S1	+$73.00/month	Yes
GDPR compliance	swedencentral region	+$0/month	Yes
1 TPS throughput	App Service S1 (always-on)	incl. above	Yes
Order persistence	Table Storage (Standard LRS)	+$8.47/month	Yes
Secrets management	Key Vault Standard	+$0.30/month	Yes
Image management	ACR Premium	+$50.00/month	Yes
Network security	Private Endpoints (3×)	+$21.60/month	Yes
DNS resolution	Private DNS Zones (3×)	+$1.50/month	Yes
Monitoring	Log Analytics (free tier)	+$0.00/month	No

Top 5 Cost Drivers

Rank	Resource	Monthly Cost	% of Total	Trend	Optimization
1	App Service Plan S1	$73.00	47.1%	➡️	1-year RI saves ~36%
2	ACR Premium	$50.00	32.3%	➡️	None (fixed Premium unit)
3	Private Endpoints	$21.60	13.9%	➡️	Fixed cost per endpoint
4	Storage Account	$8.47	5.5%	➡️	Minimize write operations
5	Private DNS Zones	$1.50	1.0%	➡️	Fixed cost

Quick Win

Apply a 1-year Reserved Instance to the App Service Plan S1 to save ~$26/month (~36% of compute cost).

Cost Distribution

Category	Monthly Cost (USD)	Share
Compute	$73.00	47.1%
Data Services	$58.47	37.7%
Networking	$23.10	14.9%
Security/Mgmt	$0.30	0.2%
Monitoring	$0.00	0.0%

6-Month Cost Projection

Projection assumes fixed App Service S1 cost with 5% monthly growth in transaction-based services. Costs are stable as fixed compute dominates.

Key Design Decisions Affecting Cost

Decision	Cost Impact	Business Rationale	Status
App Service S1 plan	+$73/month	Always-on, staging slot, VNet integration	Required
ACR Premium over Basic	+$45/month	Private endpoint support, geo-replication ready	Required
Private Endpoints (3×)	+$21.60/month	Secure traffic over VNet backbone	Required
Private DNS Zones (3×)	+$1.50/month	DNS resolution for PE-connected services	Required
LRS over ZRS	-$2/month	Single-region dev/demo	Required
No CDN/Front Door	-$25/month	< 1K users, demo scope	Optional

Not Paying For (Yet)

• Multi-region active-active failover
• Azure Front Door or CDN for static asset delivery (~$25+/month)
• Azure Monitor alerts and action groups
• CI/CD pipeline (GitHub Actions free tier covers it)
• WAF or DDoS Standard protection

Cost Risk Indicators

Resource	Risk Level	Issue	Mitigation
App Service S1	🟢 Low	Fixed cost regardless of load	RI commitment saves ~36%
Storage Account	🟢 Low	Write-heavy patterns inflate cost	Batch operations; monitor transaction count
Log Analytics	🟡 Medium	Verbose logging exceeds 5 GiB	Configure log levels; set daily cap

Watch Item

Log Analytics ingestion — if app service logs are verbose, ingestion may exceed the 5 GiB free tier, adding ~$2.76/GiB.

Quick Decision Matrix

“If you need X, expect to pay Y more”

Requirement	Additional Cost	SKU Change	Verdict	Notes
99.9% SLA	+$0/month	Already covered	🟢 Go	App Service S1: 99.95%
Reserved Instance	-$26/month	1-year RI on S1	🟢 Go	36% compute savings
CDN for static assets	+$25/month	Add Azure CDN	🟡 Monitor	Defer until > 1K users
Multi-region failover	+$80-120/month	Add ASP + PE in DR	🔴 Defer	Not needed for demo
Automated backups	+$5-10/month	Add Azure Function	🟡 Monitor	Address REQ-001 in prod

Savings Opportunities

The App Service Plan S1 is the dominant cost driver at $73.00/month (47.1%). A 1-year Reserved Instance commitment reduces compute cost by ~36%, saving approximately $26/month ($312/year).

Commitment	Monthly Compute	Savings vs Pay-as-you-go
None (PAYG)	$73.00	—
1-year RI	~$46.70	36% ($26/month)

Other services (ACR Premium, Private Endpoints, Storage ops, Key Vault) are either fixed-rate or pay-per-use with no RI/SP eligibility.

Detailed Cost Breakdown

Assumptions

• Hours: 730 hours/month (always-on App Service Plan)
• Network egress: negligible (< 1 GiB/month, within free tier)
• Storage growth: < 1 GiB in month 1, growing to ~1 GiB over 12 months

Line Items

Category	Service	SKU / Meter	Quantity / Units	Est. Monthly
Compute	App Service	S1 Plan (1 vCPU, 1.75 GiB)	730 hours/month (always-on)	$73.00
Data Services	Container Registry	Premium Registry Unit	30 days	$50.00
Networking	Private Endpoints	PE for Storage, KV, ACR	3 endpoints × $7.20	$21.60
Data Services	Storage Account	Table LRS Write Ops	260 × 10K ops (2.6M/month)	$8.45
Data Services	Storage Account	Hot LRS Data Stored (Blob)	1 GiB-month	$0.02
Networking	Private DNS Zones	3 zones (blob, vault, acr)	3 zones × $0.50	$1.50
Security/Mgmt	Key Vault	Standard Operations	10 × 10K ops (100K/month)	$0.30
Monitoring	Log Analytics	Data Ingestion (free tier)	1 GiB/month (< 5 GiB free)	$0.00
Total				$154.87

Note

All prices sourced from Azure Pricing MCP (pricing_get with swedencentral filters). 1-year RI on App Service Plan could reduce total to ~$128.87/month.