PAN Card Signature Size & Format Specifications

Last verified against NSDL and UTIITSL portal guidelines: May 2026. Requirements change — always confirm on the specific portal before submitting.

PAN card signature specifications

PAN applications are processed through two authorized portals: NSDL (now Protean eGov Technologies) and UTIITSL. Both accept online applications with scanned signature uploads, and both have specific requirements your image must meet or the form will reject it.

The requirements that apply across both portals:

• File format: JPEG only. Not PNG, not PDF, not TIFF. JPEG is the only accepted format.
• File size: NSDL requires under 10 KB. UTIITSL allows up to 30 KB on some forms. Target under 10 KB to pass on either portal.
• Background: white. The signature must appear on a white background. Transparent PNGs will fail — they render as black on most government upload systems.
• Ink: black or dark blue pen. The signature must be clearly visible against the white background.
• Dimensions: no fixed pixel requirement is published, but images in the range of 140×60 to 300×120 pixels are consistently accepted. The physical box on Form 49A is approximately 3.5 cm × 1.5 cm, so scan accordingly.

Why signatures get rejected

The portal error messages when a signature fails are vague — “invalid image” or “file size exceeded” with no hint at which rule was broken. The most common causes, in order:

• File too large. A raw JPEG from a phone camera is 2–5 MB. The 10 KB limit requires you to crop tightly to the signature and compress the JPEG significantly. The export from this tool after background removal is typically 4–8 KB.
• Wrong format.Submitting PNG when the portal expects JPEG is the second most common failure. Some browsers save images as PNG by default — make sure you select the JPEG or “white background” download option.
• Non-white background. Photographing on lined paper, cream stationery, or forgetting to remove the background all produce a non-white field behind the signature. The portal image checker expects white — anything else fails.
• Signature too faint.Light-blue pen or pencil on white paper doesn't give enough contrast, especially after JPEG compression at small file sizes. Use black or dark blue ballpoint.
• Signature cut off. Cropping too tightly to the signature edges means strokes at the boundary get cut. Leave a few pixels of white space on each side of the signature.

Step-by-step: creating a compliant PAN signature image

1. Sign on plain white paper. A4 or US Letter, blank, no lines. Use a black ballpoint or felt-tip pen. Sign in the centre of the page with white space all around — at least 20% margin.
2. Photograph it straight-on. Phone directly above the paper, lens parallel to the page. Daylight from a window works best. No flash — it creates glare. No angle — it distorts the geometry.
3. Upload to the tool above. Use the Upload tab. The adaptive threshold removes the paper background automatically. Check the preview — only your ink strokes should remain.
4. Adjust if needed. If paper texture is still visible, slide the threshold slightly higher. If strokes are getting thin, slide it lower. Try AI background removal if the result is still noisy.
5. Export as JPEG. Click Download JPG — not the transparent PNG. This produces a white-background JPEG, which is exactly what PAN portals expect. Check the file size: right-click → Properties (Windows) or Get Info (Mac). It should be under 10 KB.
6. Upload to the PAN portal. On the NSDL or UTIITSL form, locate the signature upload field. The NSDL form (Form 49A / 49AA) shows the accepted dimensions and file size limits at the upload step — confirm these match your exported file.

Physical PAN application forms

If you're submitting a physical Form 49A rather than applying online, you sign directly on the form in two places: inside the signature box (approximately 3.5 cm × 1.5 cm) and across the photo if required. Use a black or dark blue pen. Don't use pencil or a felt-tip that bleeds — the ink needs to stay clean.

For physical forms, this tool isn't needed — just sign on paper. The tool helps with online applications where you're uploading a digital image of your signature.

NRI considerations

NRIs apply using Form 49AA rather than Form 49A. The form is available on both the NSDL and UTIITSL portals. The signature image requirements are identical to domestic applications: JPEG, under 10 KB, white background, same signature as on your passport and other official documents.

NRIs applying by post (common when you don't have access to a scanner abroad) print the form, sign by hand, and mail it. In that case the digital signature upload step doesn't apply.

One practical issue for NRIs: the signature you submit for your PAN must match the signature on your passport. If your passport is signed in one style and your day-to-day signature has evolved, use the passport version for the PAN application.

Troubleshooting a rejected upload

1. Switch to JPEG if you used PNG.
2. Check file size — must be under 10 KB for NSDL. If your file is larger, the JPEG export is smaller than PNG.
3. Re-photograph on plain white paper if you used lined or colored paper.
4. Make sure the background is white, not transparent.
5. Try a different browser — some older portal implementations have inconsistent file upload behavior across browsers.
6. Contact NSDL or UTIITSL helpdesk if none of the above works. The error message may indicate a specific requirement that isn't publicly documented.