Why Is My Turnitin AI Score Not Showing?

First, identify the indicator

Turnitin uses different indicators for different situations. The exact layout depends on whether your university uses the new or classic Similarity Report, but this quick map is a useful starting point:

Turnitin’s guide to accessing the AI Writing Report describes these indicator states. Its AI Writing Report guide also explains that the AI percentage is independent of the Similarity Score.

A Similarity Score is not an AI score

It is possible to see a Similarity Score while the AI score is missing. Similarity asks how much text matches Turnitin’s selected databases. AI writing detection estimates how much qualifying prose may have been generated or altered by an AI writing tool. They are separate reports with separate requirements.

That is why a normal similarity percentage does not prove that an AI report should exist, and a missing AI percentage does not tell you what your similarity report says. If you are unsure how to read the matching-text report, see our Turnitin Similarity Report guide.

Check whether the assignment can produce an AI report

AI writing detection is not automatically available in every Turnitin assignment. Turnitin’s current assignment documentation identifies AI writing as an Originality add-on feature. Your institution must have the relevant license, and the feature must be enabled for the assignment and submission workflow.

The student view may also differ by learning-management-system integration. Ask your instructor or administrator these specific questions:

1. Does this institution and assignment have Turnitin Originality AI writing detection?
2. Was AI writing detection enabled when my file was submitted?
3. Is the AI Writing Report available to students in this integration, or only to staff?
4. Does this submission need to be resubmitted after the feature was enabled?

If AI detection was disabled when the file was submitted, Turnitin says that enabling it later does not automatically create the old report; the file needs to be resubmitted to generate one. The current Turnitin assignment guide explains the Originality add-on requirement and how an assignment list displays missing AI reports.

Check the file requirements

Turnitin lists these requirements for an AI Writing Report and percentage:

• The file must be under 100 MB.
• It must contain at least 300 words of prose in a long-form writing format, such as an essay, dissertation, or article.
• It must not exceed 30,000 words.
• The current supported languages listed by Turnitin are English, Spanish, Japanese, and Arabic. Chinese is not included in that list.
• The accepted file types listed are .docx, .pdf, .txt, and .rtf.

The 300-word requirement is about qualifying prose, not simply the word count shown by a word processor. Turnitin says that it does not reliably detect non-prose such as code, poetry, scripts, bullet points, tables, or annotated bibliographies. A document made mostly from those formats may therefore have no usable AI percentage, or a percentage that does not cover every part of the file.

For PDFs, make sure the text is selectable rather than a scan made only of images. Turnitin’s file requirements guide explains why image-only PDFs cannot be checked as ordinary text.

If the report is still loading

Turnitin says that generating AI Writing Report results can take several minutes. While it is processing:

1. Keep the original submitted file and submission receipt.
2. Wait a few minutes, then refresh or reopen the report. If the AI percentage opens in a new tab, check that your browser allows pop-ups.
3. Do not treat a loading state as a 0% result.
4. Avoid repeatedly submitting files unless your assignment instructions allow it; a new submission can replace or complicate the record you need your instructor to review.

If the report remains in a loading state well beyond the normal processing period, ask the instructor to check the submission from the staff view. They can confirm whether the report is queued, unavailable because of the license or settings, or failed.

If you see a grey indicator or an error

A grey indicator with no percentage means Turnitin could not process the submission for AI writing detection. According to its access guide, this can happen when the submission predates AI detection or does not meet the file requirements. An error icon means the processing attempt failed.

Use this order of checks:

1. Check the file. Confirm the format, selectable text, language, prose length, word limit, and file size.
2. Check the assignment. Ask whether the Originality add-on and AI writing detection were enabled at the time of submission, and whether students are allowed to view the report.
3. Check the submission date. A file submitted before AI detection was available for that assignment may not gain a report later without a permitted resubmission.
4. Ask for an administrator check. If the file meets every requirement and the report still errors, Turnitin recommends contacting the institution’s Turnitin administrator. Include the assignment, submission time, indicator state, and original filename; do not send a new copy to an untrusted “free Turnitin checker.”

Do not delete the original file while troubleshooting. The submission record and your drafts may be useful if a report problem needs to be documented.

If you see *% instead of a number

This is the most easily misunderstood state. A *% indicator means Turnitin processed the report but estimated that between 1% and 19% of the qualifying prose may be AI-generated or AI-altered. Turnitin intentionally does not show the exact percentage or highlights in that range because its testing found a higher incidence of false positives below 20%.

So:

• *% is not the same as “no report”.
• It is not a hidden 0% score.
• It is not a universal pass/fail threshold.
• You should not rewrite a genuine draft merely to force a different detector result.

For context, our AI detector comparison explains why another detector’s number cannot be treated as a substitute for your institution’s Turnitin report.

Why GPTZero cannot fill the gap

If Turnitin shows no AI score, it can be tempting to paste the same work into GPTZero. That may give you a separate signal, but it cannot make the Turnitin report appear and it cannot predict the number your university would see. The systems, models, data, interfaces, and thresholds are different.

GPTZero’s own limitations guidance says that human writing can be classified as AI and AI writing can be classified as human. It also says document-level results are more reliable than paragraph- or sentence-level results and recommends that detector results not be used as the sole basis for academic punishment. That is good advice for interpreting any detector, including Turnitin: a score is a signal for human review, not a verdict about your intent.

The short checklist

Before contacting your tutor, note:

• the indicator you see: loading, grey, dash, error, *%, or a number;
• when and where you submitted the file;
• the file type, approximate prose word count, and language;
• whether the Similarity Report is available;
• whether your course says students can view AI Writing Reports.

Then ask the instructor or Turnitin administrator to confirm the assignment license, AI detection setting, report visibility, and processing status. If the report is genuinely unavailable, you can still follow your university’s academic-integrity policy, keep your drafts and sources, and explain your writing process if asked. A missing score is a technical or configuration state—not evidence that your work is either safe or misconduct.

Frequently asked questions

Does a missing Turnitin AI score mean 0% AI?

No. A missing score can mean that processing is incomplete, the file is not eligible, AI detection is not enabled or licensed, the submission predates the feature, or processing failed. A processed 0% result is a different state.

Why can I see a Similarity Score but not an AI score?

Because the two reports are separate. Similarity can be available while the AI report is unavailable because of the Originality add-on, assignment settings, file requirements, language, or processing status.

What does *% mean?

It means the report was processed and the estimated AI proportion is between 1% and 19%. Turnitin suppresses the exact result and highlights in that range to reduce the risk of over-interpreting false positives.

Can a Chinese-language paper receive a Turnitin AI score?

Chinese is not listed among the languages in Turnitin’s current official AI Writing Report file requirements. Ask your institution whether its particular product and integration support your submission language.

How long should I wait?

Turnitin says that report generation can take several minutes. After that, check the requirements and ask your instructor to inspect the staff-side status. Persistent processing errors should go to your Turnitin administrator.

Can GPTZero tell me what Turnitin would show?

No. It is a different probabilistic classifier. Use it, if at all, as a separate drafting signal—not as a prediction, guarantee, or replacement for the system your institution uses.