Can you write off cloud storage for client files?

Usually, yes — cloud storage used for client files is often deductible as a business expense if it is ordinary, necessary, and used for business purposes.

General rule:

• Business-only use: If the storage account is used only for business (for example, client files, work backups, or business records), you can generally deduct the business portion of the cost.
• Mixed personal and business use: If the same account is also used for personal files, you should generally deduct only the business-use portion.

How it’s usually reported in the U.S.:

• For a sole proprietor or single-member LLC taxed as a sole proprietor, this is often reported on Schedule C as a business expense in the software/category that best fits your records, such as software, office expense, or miscellaneous business expense. The exact category can vary by tax year, filing method, and how your preparer classifies it.

What to keep:

• Monthly or annual invoices/receipts
• Proof of payment
• Notes showing the business purpose of the storage

Important caveat:
Tax treatment can vary by country, state, and entity type, and mixed personal/business use matters a lot. If you want to be safe, keep the account separate for business use and confirm the deduction with a CPA or tax professional. Exact reporting details can change, so it’s a good idea to check the current official guidance for your filing situation.