BS family · General Purposex86_64 · Intel/AMD

B1ms

The Azure B1ms (Standard_B1ms) is a virtual machine from the Bs series, with 1 vCPU, 2 GB of RAM and 4 GB of temporary storage. On-demand pricing starts at $0.0207/hour in East US.

Updated September 3, 2026
vCPUs
1
Memory
2 GB
Network
Up to 1–4 Gbps
Storage
4 GB Temp SSD

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Region
Currency
OS
Pricing Overview

The Azure B1ms costs $0.0207/hour ($15.11/month) for Linux and $0.0246/hour ($17.96/month) for Windows in East US, as of 3 September 2026.

All pricing options

East US · USD · Linux OS · monthly = 730 hrs
Prices exclude local taxes
Term / TierHourlyMonthlySavings
Standard Tier — On-Demand
$0.0207$15.11 Baseline
1-Year Reserved Instance
N/AN/A Baseline
3-Year Reserved Instance
N/AN/A Baseline
Spot Instance
N/AN/A Baseline
You could save $15.11/mo on this instance with the right pricing model.
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Monthly cost estimator

Estimate your spend based on actual usage.
730 h
1h365h730h (24/7)
1
Estimated monthly
$15.11
730 hrs × $0.0207/hr × 1
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Compute

x86_64 · Intel/AMD
vCPUs i1
Memory i2 GB
Physical processorIntel® Xeon® Processor
Nested VirtualizationSupported
Sole TenantSupported
GPUNone
Within BS family
B1s
1 vCPU
B1ls
1 vCPU
B1ms
1 vCPU
B2s
2 vCPU
B2ms
2 vCPU
B4ms
4 vCPU
B8ms
8 vCPU
B12ms
12 vCPU
B16ms
16 vCPU
B20ms
20 vCPU

Lock in this rate across your fleet — typically save 30–40%

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Networking

Max egress bandwidth1–4 Gbps
Tier 1 bandwidthN/A
Enhanced networking iYes (gvnic/virtio)
IPv6 supportYes (Dual-stack VPC)

Storage

Max persistent disks4
Max disk size32 TB
Local SSDsSupported (Scratch Disk)
Instance storage: Persistent Disk only by default — attach volumes for persistent storage.

Compare with another instance

vs.
SpecB1msB1sΔ
vCPUs110%
Memory2 GB1 GB-50%
Hourly Price$0.0207$0.0104-50%
Monthly Price$15.11$7.59-50%
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Cost optimization

Azure recommender alerts can cut this bill ~30-40%.

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