The phrase "a rolling monthly basis" is correct and usable in written English.
It can be used to describe a process or activity that occurs continuously or repeatedly on a monthly schedule.
Example: "We will review our financial performance on a rolling monthly basis to ensure we stay on track with our goals."
Alternatives: "on a monthly cycle" or "monthly recurring basis".
The EU budget is calculated on a rolling monthly basis.
The UK's GDP figures are produced on a rolling monthly basis for each quarter.
Equally important is that most contracts will be offered on a rolling monthly basis, requiring one month's notice.
It has been releasing them on a rolling monthly basis since last June.
Instead, her emails were ordered released on a rolling monthly basis by a federal court judge in response to VICE News Freedomm of Information Act lawsuit, which was filed months before the New York Times revealed that Clinton exclusively used a private server to conduct official business.
But by then, VICE News FOIAA lawsuit was already before a federal court judge who ordered the department to release the 52,459 pages of Clinton's emails on a rolling monthly basis, rejecting a State Department proposal to release the entire archive in January 2016.
At the end of your stated trial period, your subscription will automatically continue on a rolling monthly or quarterly basis (this will be made known to you before you complete registration to the trial offer) at the rate notified to you at the time of purchase.
He joins on a rolling monthly contract.
All such disclosures are now reviewed and approved on a rolling weekly basis, leaving the monthly COI Committee meeting for deliberation of more complex and/or complicated cases.
Travel grant applications are submitted online on a rolling basis and reviewed monthly by the Head Graduate Adviser and GAO.
"Until late last year, Facebook disclosed monthly active users (MAUs, hereafter 'users' for simplicity) for its smartphone apps, on a rolling daily basis," he wrote in his original blog post.
