M365 Backup Storage & Retention Cost Estimator

Organization profile

All values are private and calculated in-browser.

Users protected

Licensed users in your tenant.

Workloads protected

Exchange OneDrive SharePoint Teams

Data footprint

Use realistic averages for your tenant.

Mailbox size per user (GB)

Exchange Online

OneDrive size per user (GB)

OneDrive for Business

SharePoint total data (GB)

Enter 0 if not protecting SharePoint.

Teams data per user (GB)

Teams chats & metadata

Compression & dedup efficiency

Snapshots per day

1/day

Daily data change rates

Typical daily changes: Exchange ~1%, OneDrive ~2%, SharePoint ~1.5%, Teams ~0.5%.

Exchange change rate (%/day)

1.0%

OneDrive change rate (%/day)

2.0%

SharePoint change rate (%/day)

1.5%

Teams change rate (%/day)

0.5%

Retention policy (GFS)

Grandfather–Father–Son retention: daily, weekly, monthly, yearly snapshots kept.

Daily copies (days)

Weekly copies (weeks)

Monthly copies (months)

Yearly copies (years)

Pricing model

Compare storage-included SaaS vs. bring-your-own-storage (BYOS) + license.

Choose model

Object storage vendor

Wasabi has a 90-day minimum retention and 1 TB account minimum.

Backup license ($/user/mo)

Adjust to match your vendor quote.

Please correct highlighted fields.

Results ready

Estimates based on typical SMB/MSP M365 workloads and pricing benchmarks.

Baseline dataset

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Exchange/OneDrive/SharePoint/Teams

Seed backup (compressed)

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Reduction: —

Retained footprint

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Daily/Weekly/Monthly/Yearly

Workload mix

Retention breakdown

Component	Assumption	Size (GB)
Total retained (incl. 10% overhead)		—

We assume dedup/compression applies to all increments. Weekly/monthly/yearly increments cap at reasonable churn percentages to avoid overestimation.

Your selection

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Alternatives snapshot

Option	Est. $/mo	Notes

Prices reflect typical North America list rates: Wasabi $6.99/TB-mo, Azure Hot ~$0.0184/GB-mo, AWS S3 Standard ~$0.023/GB-mo. Your region and discounts may vary.

Recommendation: —

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M365 Backup Storage & Retention Cost Estimator

YourData365 — M365 Backup Storage & Retention Cost Estimator