What is the HMRC upload size limit?

HMRC limits document attachments to 2MB per file for self-assessment and other submissions. Scan P60s and payslips at 150–200 DPI then compress to stay under 2MB.

Are my merged tax records kept private?

Absolutely. The merging process is completely local to your device, ensuring maximum privacy for your sensitive financial data.

Merge PDF for HMRC

Combine multiple PDF documents or certificates into a single file. Control order, sort pages, and optimize output size.

Official Requirements for HMRC

To ensure your document is accepted by the United Kingdom official platform, it must meet the following strict criteria:

Maximum File Size: 2048 KB
Self-assessment attachments: max 2MB per file.
Accepted formats: PDF, JPEG, PNG.
Tax return supporting evidence must be clearly legible.
P60, P45, and payslip scans must show all text clearly.

Disclaimer: These requirements are verified based on official guidelines. However, platform rules and guidelines can change. Always consult the official HMRC portal before final submission.

Common Rejection Reasons

File size over 2MB.
Corrupted or password-protected PDF.
Document not legible after compression.

Official Guidelines Compliance

Merging HMRC Tax Records

Filing comprehensive tax returns with HMRC often involves submitting multiple addendums, invoices, and accounting schedules. Instead of managing multiple scattered files, use our tool to merge all your HMRC-related PDF documents into a single, organized master file, streamlining your online tax submission and record-keeping.

How to Use Merge PDF for HMRC

Follow these simple steps to ensure your file meets all requirements for HMRC.

Select Tax Documents

Upload the various PDF financial records required by HMRC.

Merge the Files

Combine the individual PDFs into a comprehensive master document.

Download for Submission

Save the final merged PDF to upload to the HMRC system.

Frequently Asked Questions about HMRC

Answers to common questions regarding requirements for HMRC.

What is the HMRC upload size limit? HMRC limits document attachments to 2MB per file for self-assessment and other submissions. Scan P60s and payslips at 150–200 DPI then compress to stay under 2MB.: HMRC limits document attachments to 2MB per file for self-assessment and other submissions. Scan P60s and payslips at 150–200 DPI then compress to stay under 2MB.
Are my merged tax records kept private? Absolutely. The merging process is completely local to your device, ensuring maximum privacy for your sensitive financial data.: Absolutely. The merging process is completely local to your device, ensuring maximum privacy for your sensitive financial data.