> For the complete documentation index, see [llms.txt](https://guides.gresb.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://guides.gresb.com/data-center-assessment/1.-getting-started/timeline.md).

# Timeline

The GRESB Assessment cycle follows a structured set of milestones designed to support participants throughout the reporting process — from preparation and submission to results review and performance planning. Please check back periodically to ensure you do not miss any important deadlines.

The GRESB Data Center Assessment operates year-round. Participants may resubmit their assessment as needed, and an updated Insights Report will be generated once GRESB completes validation and scoring of the submitted response.

### GRESB Dates

Key dates for the **2026** reporting cycle:

<table><thead><tr><th width="230.75927734375"><select><option value="t50IQucFE2Ck" label="Year-Round" color="blue"></option><option value="FN8R9WOrPj6K" label="September" color="blue"></option><option value="SlP9msLIDXbQ" label="January" color="blue"></option><option value="ucwVRY7jzplu" label="May" color="blue"></option><option value="tbPI1TtQObKY" label="August" color="blue"></option><option value="4HNrl1uTT0tD" label="Year-Round (starting in August)" color="blue"></option><option value="9P1aqjOW3ntX" label="July" color="blue"></option><option value="7ndXibfeYG9w" label="October" color="blue"></option><option value="NEH7tWkDZ7dA" label="November" color="blue"></option><option value="cGeMmYbbk7t5" label="Year-Round (starting in July)" color="blue"></option><option value="sGJ8nHwyDKHY" label="Year-Round*" color="blue"></option></select></th><th width="166.5740966796875"></th><th></th></tr></thead><tbody><tr><td><span data-option="ucwVRY7jzplu">May</span></td><td><strong>Assessment Development</strong></td><td>Standards and GRESB Guides are released.</td></tr><tr><td><span data-option="9P1aqjOW3ntX">July</span></td><td><strong>Assessment Opening</strong></td><td><strong>July 15:</strong> The assessment opens for participants.</td></tr><tr><td><span data-option="NEH7tWkDZ7dA">November</span></td><td><strong>Benchmark Report</strong></td><td>Benchmark results are released to Participants and made available in the <a href="https://portal.gresb.com/log_in">GRESB Portal</a>.</td></tr><tr><td><span data-option="NEH7tWkDZ7dA">November</span></td><td><strong>Public Results</strong></td><td>Public results events.</td></tr><tr><td><span data-option="t50IQucFE2Ck">Year-Round</span></td><td><strong>Onboarding Service</strong></td><td><p>Starting in <strong>July</strong>, new participants may request an onboarding call.</p><p><br>Please contact your Account Manager to schedule.</p></td></tr><tr><td><span data-option="sGJ8nHwyDKHY">Year-Round*</span></td><td><strong>Resubmission</strong></td><td>Starting in <strong>August:</strong> Participants may resubmit their assessment as needed.</td></tr><tr><td><span data-option="sGJ8nHwyDKHY">Year-Round*</span></td><td><strong>Insights Report</strong></td><td>Starting in <strong>August:</strong> Insights Reports become available following submission and completion of validation and scoring.<br><br>Results available in the <a href="https://portal.gresb.com/log_in">GRESB Portal</a>.</td></tr></tbody></table>

{% hint style="info" %}
**Year-Round\*: In 2026, Resubmission and Insights Reports become available starting in August.**

\
From this date onwards, participants may resubmit their assessment as needed and will receive an updated Insights Report within 4 weeks of each submission.
{% endhint %}

Key dates for **future** reporting cycles:

The assessment will be available year-round with on-demand insights reports and fixed dates for the Benchmark. This means participants will be able to submit and re-submit as from the start of the reporting period, with an insights report being made available within a maximum of 4 weeks from the submission.


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