.png)
Both Azure Savings Plans and Reserved Instances reduce your Azure compute bill by committing to a term. Both require 1-year or 3-year commitments. Both apply discounts automatically without changing your infrastructure. The difference is what you commit to — and that determines which workloads benefit, how deep the discount goes, and what happens if your architecture changes mid-term.
This guide covers both products with verified discount rates, the application order when you have both, the cancellation mechanics, and the layered strategy that extracts the most savings from your Azure compute estate.
Head-to-Head Comparison: Azure Savings Plans vs Reserved Instances
All discount ranges from Microsoft official pricing (azure.microsoft.com/pricing, January 2026). Verify — rates change and vary by VM family, region, and OS.
| Dimension | Azure Savings Plans | Azure Reserved Instances | Winner |
| Max discount (Linux VM) | Up to 65% (3-year) | Up to 72% (3-year) | RI wins by ~7 points |
| Max discount (Windows VM with Hybrid Benefit) | Up to 65% on hardware | Up to 80%+ with Hybrid Benefit stacked | RI wins significantly |
| Commitment type | $/hour spend level (flexible) | Specific VM family + region + term | Savings Plans (flexible) |
| Region flexibility | All Azure regions globally | Single region only | Savings Plans |
| VM family flexibility | Any VM family | Fixed family (with optional size flex within family) | Savings Plans |
| Services covered | VMs, App Service Premium v3, Container Instances, Azure Functions Premium | Specific VM family only | Savings Plans |
| Term options | 1-year or 3-year | 1-year or 3-year | Tie |
| Covers unused capacity? | No — unused commitment is charged | No — unused reservation is charged | Tie (both charge for unused) |
| Application order (when both active) | Applied second | Applied first (deeper discount wins) | RI applied first — by design |
| Early cancellation | Cancel with refund (pro-rated, $50K annual cap) | Cancel with refund (pro-rated, $50K annual cap) | Tie |
| Database workloads | Azure Database Savings Plans available (12-35%) | SQL Database RI, PostgreSQL RI available (up to 65%+) | RI for databases |
| Best for | Multi-region, evolving VM families, mixed compute services | Stable single-region, fixed VM family, maximum discount priority | Depends on workload |
Sources: azure.microsoft.com/pricing/offers/reservations/vm-instances and azure.microsoft.com/pricing/offers/savings-plans (January 2026). Discount ranges are maximums for specific SKUs; most workloads realize discounts in the lower portion of each range. Verify at Microsoft’s pricing pages — rates change.
What Azure Savings Plans Actually Cover
Azure Savings Plans for Compute cover a broader set of services than Reserved Instances. The commitment is a dollar-per-hour spend floor — you agree to spend at least $X per hour on eligible compute, and Azure applies discounted rates to that usage automatically.
Eligible services: Azure Virtual Machines, Azure App Service Premium v3 plans, Azure Container Instances, and Azure Functions Premium plan. The discount applies across Windows and Linux VMs, across all Azure regions globally, and across all VM families. You do not need to specify which region or VM family will receive the discount — Azure applies it to your eligible usage automatically, optimizing for the highest discount rate first within your committed amount.
What Savings Plans do not cover: Azure SQL Database (use Azure SQL reservations or Database Savings Plans), Azure Cosmos DB, Azure Kubernetes Service (the underlying VMs running AKS nodes qualify, but the AKS service charge does not), storage, networking, and any non-compute service.
Azure Hybrid Benefit interaction: If you have existing Windows Server or SQL Server licenses with Software Assurance, Azure Hybrid Benefit lets you use those licenses on Azure VMs instead of paying the Azure Windows surcharge. Applied on top of a Savings Plan or RI, Hybrid Benefit reduces the effective cost further — the Savings Plan or RI discounts the underlying VM hardware while Hybrid Benefit eliminates the OS license charge. Combined, total discounts can reach 80%+ on eligible Windows VMs. Source: azure.microsoft.com (January 2026).
What is a Compute Savings Plan? Azure and AWS explained
What Azure Reserved Instances Actually Cover
Azure Reserved Instances (also called Reserved VM Instances) commit to a specific VM family in a specific Azure region for 1 or 3 years. In exchange, Azure applies a discount of up to 72% on the compute cost of matching VMs. The discount applies automatically to running VMs that match the reservation — no assignment or configuration change required.
The specificity of the commitment is both its strength and its risk. Because the reservation is locked to a VM family and region, Azure can offer deeper discounts than Savings Plans. The risk: if your team migrates VMs to a different region, resizes to a different family, or shuts down the committed workload mid-term, the reservation continues billing at the committed rate against no matching usage.
Instance Size Flexibility
Azure Reserved Instances offer an optional instance size flexibility setting. When enabled, a single RI can cover multiple VM sizes within the same family through a normalization unit system similar to AWS RDS size flexibility. A D4s_v5 reservation can cover D2s_v5, D8s_v5, and other D-series VMs in the same region. Enabling size flexibility sacrifices approximately 2-3% of the maximum discount but protects against VM right-sizing changes during the term. For most enterprise deployments, enabling size flexibility is the right default — the 2-3% discount cost is worth the protection against the common scenario of VM right-sizing mid-year.
Cancellation and Exchange Policy
Azure Reservations can be cancelled for a prorated refund subject to a $50,000 cap per billing profile per 12-month rolling window. As of May 2026, there is no early termination fee, but Microsoft has previously signaled a potential 12% early termination fee may be introduced — verify the current policy at azure.microsoft.com/pricing/offers/reservations before purchasing. The $50,000 annual cap per billing profile limits the flexibility for large enterprises with significant RI positions.
The exchange policy for Azure compute reservations (exchanges within the same subscription to different VM families or regions) was extended indefinitely in 2024 — it was initially planned to end January 1, 2024. This means you can currently exchange an RI for a different VM family or region without the cancellation refund cap applying. Source: azure.microsoft.com/updates (January 2026). Verify current exchange policy before relying on it — Microsoft can modify this at any time.
How commitment-based discounts work across AWS, Azure, and GCP
How Azure Applies Discounts When You Have Both
When a VM matches both an active Reservation and a Savings Plan, Azure applies the Reservation first. This is by design: Reservations carry deeper discounts, so Azure uses the deepest discount first for any eligible usage.
The practical implication: if your committed reservation coverage fully covers your VM usage in a given hour, the Savings Plan commitment for that hour is unused (the committed dollars are charged regardless, but they do not generate additional discount because the VM is already fully discounted by the Reservation). This means over-buying both products on the same workload generates waste on the Savings Plan layer.
The correct layering strategy: purchase Reservations for the predictable, stable, fixed-configuration core of your VM estate. Purchase a Savings Plan for the remaining flexible compute — VMs that may change families or regions, App Service plans, Container Instances, and any compute that does not warrant a specific VM reservation. Size the Savings Plan commitment at the spend level of your non-reserved flexible compute, not the total compute estate.
Real question: I bought a Savings Plan but my bill barely changed. What happened?
Two common causes. First: you already had Reserved Instances covering most of your VMs. Because Reservations apply first and you were already getting their discount, the Savings Plan found very little uncovered compute to apply to. The Savings Plan commitment is still being charged, but it is generating minimal additional savings.
Solution: size the Savings Plan to cover only the compute not already covered by Reservations. Second: you set the Savings Plan commitment higher than your actual hourly compute spend during off-peak hours. The Savings Plan charges the committed hourly amount regardless of actual usage.
If you committed to $10/hour but your VMs only cost $6/hour at night, you are paying $4/hour for unused commitment. Solution: set the Savings Plan commitment at 70-80% of your minimum observed hourly compute spend, not the average or peak.
Azure Savings Plans for Databases
A separate commitment product exists for Azure database services: Azure Database Savings Plans. This is distinct from the Compute Savings Plans described above and covers Azure SQL Database, SQL Managed Instance, PostgreSQL, MySQL, MariaDB, and Cosmos DB.
The discount structure for Database Savings Plans is materially different from Compute Savings Plans. The advertised maximum is 35% — but that 35% applies specifically to Azure SQL Database Serverless tier. Most production workloads run on vCore General Purpose or Business Critical pricing tiers, where Database Savings Plan discounts are in the 12-18% range. If you are evaluating Azure Database Savings Plans expecting 35% off your SQL production bills, you will be disappointed.
For database workloads, Azure Reserved Instances for specific database services (Azure SQL Database reserved capacity, Azure Database for PostgreSQL reserved compute, Cosmos DB reserved capacity) deliver higher discounts — up to 65%+ on some configurations — at the cost of committing to specific service tiers and regions. The same flexibility-versus-discount trade-off applies as for VMs.
Azure Database Savings Plans: eligibility table, discount rates, and when to use them
Which Should You Buy First?
Buy Reserved Instances First for Stable VM Workloads
If you have VMs that have run in the same Azure region on the same VM family for 6+ months with no planned migrations or family changes, buy a Reserved Instance for those VMs first. The deeper discount (up to 72% versus 65%) compounds significantly at scale. Enable instance size flexibility when purchasing to protect against right-sizing changes during the term.
For Windows VMs: layer Azure Hybrid Benefit on top of any Reserved Instance purchase. Hybrid Benefit eliminates the Windows license cost entirely for organizations with qualifying Software Assurance licenses, pushing total effective discounts well above 72%.
Buy Savings Plans for Everything Else
After reserving the stable core, use an Azure Savings Plan to cover the remaining flexible compute: VMs that may move regions, App Service Premium plans, Container Instances, Azure Functions Premium plans, and any VM workloads where you are not confident enough in the configuration to purchase a specific RI.
Size the Savings Plan at 70-80% of your non-reserved flexible compute spend. This covers the consistent portion without generating waste during low-traffic periods. Any compute above the Savings Plan commitment in a given hour reverts to pay-as-you-go rates.
Start with Savings Plans if You Are New to Azure Commitments
If your team has never purchased Azure commitments before and does not have 6 months of stable usage data to analyze, start with a Savings Plan rather than Reservations. The flexibility of the Savings Plan — any region, any VM family — means a wrong-sized or wrong-family commitment still generates savings. A wrong-region or wrong-family RI generates zero savings and continues billing.
Real question: What if I already bought Azure Reserved Instances and need more flexibility?
Two options. First: use the Azure exchange policy to modify existing Reservations to a different VM family or region without triggering the $50,000 cancellation cap (this exchange policy was extended indefinitely as of 2024 — verify current status at azure.microsoft.com). This is the correct path if you know exactly which configuration you want instead. Second: layer a Savings Plan on top.
The Savings Plan will cover flexible compute not already matched by your Reservations. It will not undo the RI commitment, but it ensures new and migrated VMs get commitment discounts even when they do not match your existing Reservations. Going forward, right-size your RI purchases more conservatively and let the Savings Plan absorb the flexible overflow.
The Discount Gap in Real Numbers
The 7-percentage-point difference between Savings Plans (65%) and Reserved Instances (72%) compounds at scale. Here is what that means at three spend levels for a stable VM workload where both products are eligible.
$100,000 annual VM spend: RI saves $72,000/year. Savings Plan saves $65,000/year. Annual difference: $7,000. Over 3 years: $21,000.
$500,000 annual VM spend: RI saves $360,000/year. Savings Plan saves $325,000/year. Annual difference: $35,000. Over 3 years: $105,000.
$1,000,000 annual VM spend: RI saves $720,000/year. Savings Plan saves $650,000/year. Annual difference: $70,000. Over 3 years: $210,000.
These figures use maximum discount rates for stable, Linux VMs in a single region at 3-year commitment. Most production workloads realize discounts in the 36-50% range for Reserved Instances and 30-45% for Savings Plans depending on VM family and region. The direction of the comparison holds — RIs save more for eligible stable workloads — but verify your specific VM pricing at azure.microsoft.com/pricing/details/virtual-machines. Rates change.
Usage.ai Insured Flex Commitments apply to Azure Savings Plans and Reserved VM Instances. The platform analyzes your actual Azure usage hourly, calculates the optimal split between RI coverage for stable VMs and Savings Plan coverage for flexible compute, and purchases both automatically. If any commitment becomes underutilized, Usage.ai provides cashback in real money — not credits. This changes the risk calculation for purchasing deeper RI commitments: the buyback guarantee removes the primary reason teams under-commit on Azure. Source: Usage.ai project documentation.
See how Usage.ai optimizes Azure Reserved Instances and Savings Plans together
Choose Azure Savings Plan When… Choose Reserved Instances When…
Choose Azure Savings Plans when: your VMs are spread across multiple Azure regions and may continue shifting. Your team is actively migrating to newer VM families. You need one commitment to cover VMs, App Service, and Container Instances simultaneously. You are making your first Azure commitment and want flexibility while you learn your usage patterns. Your architecture evolves faster than a 1-year fixed configuration commitment can accommodate.
Choose Azure Reserved Instances when: your VMs have run in the same region and family for 6+ months with no planned changes. Maximizing the discount percentage is the priority. You have Windows VMs and can stack Azure Hybrid Benefit for combined discounts above 80%. You are committing to a multi-year architecture that is genuinely stable. You have database workloads on Azure SQL or PostgreSQL where DB-specific RIs deliver 65%+ versus the Savings Plan’s 12-18%.
Use both when: you have a mix of stable and flexible compute. Purchase RIs for the stable core at maximum discount, then a Savings Plan for the flexible remainder. This layered approach is the standard recommendation for mature Azure FinOps programs and typically delivers the highest combined effective discount rate across a mixed compute estate.
Frequently Asked Questions
1. What is the difference between Azure Savings Plans and Reserved Instances?
Azure Savings Plans commit to a dollar-per-hour spend level and apply discounts (up to 65%) across any VM family, any Azure region, App Service, Container Instances, and Azure Functions. Reserved Instances commit to a specific VM family and region for deeper discounts (up to 72%). RIs are less flexible but save more for stable workloads. Savings Plans are more flexible but save slightly less. When both apply to the same VM, the Reservation discount is applied first. Source: azure.microsoft.com (January 2026).
2. Do Azure Reserved Instances save more than Savings Plans?
Yes, for stable, single-region, single-family VM workloads. Reserved Instances save up to 72% versus 65% for Savings Plans on equivalent Linux VMs at 3-year terms. The 7-point difference is $35,000/year on a $500,000 VM spend. However, if your VMs change families or regions during the term, an RI generates zero savings on the migrated instances. The higher discount is only worth it when the configuration is genuinely stable for the full commitment term.
3. Can you use Azure Savings Plans and Reserved Instances at the same time?
Yes, and it is the recommended approach for most Azure deployments. Use Reserved Instances for stable, fixed-configuration VMs at maximum discount. Use a Savings Plan for flexible compute — variable VM families, multi-region workloads, App Service, Container Instances. When both apply to the same VM, Azure applies the Reservation first. Size the Savings Plan to cover only the compute not already reserved.
4. What happens if I do not use my Azure Reserved Instance?
The reservation continues billing at the committed rate regardless of actual VM usage. If no matching VM is running, the RI generates no savings but still charges. You can cancel for a prorated refund subject to a $50,000 cap per 12-month rolling window per billing profile. Alternatively, use the exchange policy to convert the RI to a different VM family or region where you have running VMs. Verify current cancellation terms at azure.microsoft.com/pricing/offers/reservations.
5. Do Azure Savings Plans cover databases?
Not directly. Azure Compute Savings Plans cover VMs, App Service Premium v3, Container Instances, and Azure Functions Premium. A separate product, Azure Database Savings Plans, covers Azure SQL Database, SQL Managed Instance, PostgreSQL, MySQL, and Cosmos DB at 12-35% savings. For production database workloads, Azure Reserved Instances for specific database services (Azure SQL reserved capacity, PostgreSQL reserved compute) deliver higher discounts of up to 65%+.
6. What is the Azure Savings Plan maximum discount?
Up to 65% savings on Azure Virtual Machines with a 3-year Savings Plan. The 65% figure is based on one M64dsv2 VM running Ubuntu Linux in East US for 36 months compared to pay-as-you-go rates, per Microsoft’s official pricing page (January 2026). Most production VM workloads realize discounts in the 30-50% range. Verify your specific VM at azure.microsoft.com/pricing/details/virtual-machines.
7. How do I choose the right commitment amount for an Azure Savings Plan?
Pull your last 30 days of Azure compute spend at hourly granularity from Azure Cost Management. Find the P70 of your hourly compute spend — the spend level you are at or above for 70% of hours. Set your initial Savings Plan commitment at 70-75% of that P70 value. This ensures the commitment is below your consistent minimum spend, generating full utilization without the waste that comes from over-committing during low-traffic periods. Review after 30 days and adjust upward if utilization is consistently above 95%.
