How many backlogs can you carry in VTU? The unit changed from subjects to credits

"How many backlogs can I carry" is the most common VTU question there is, and most answers to it are out of date. Not wrong when they were written — out of date. The threshold used to be counted in subjects. Under the 2022 regulations it is counted in credits. Those are different units, and a student admitted in 2022 who follows advice about "four backlogs" is measuring the wrong thing entirely.

First, the word VTU actually uses

The regulations do not use the phrase "supplementary exam" anywhere. A failed course earns an F grade. Related grades are AB for absent, and DX or NE where attendance fell below the required 75%. The mechanism for re-attempting a course is called re-registering it, and clearing a backlog is called completion of backlog courses.

This matters practically. Searching for the official rule using the words your friends use finds coaching sites. Searching with the university's own vocabulary finds the regulation.

The threshold, by regulation

The last row is deliberate. A 2025 scheme of teaching and examinations exists, and it is not the same document as a regulation carrying its own promotion threshold. Until the threshold is notified, the honest answer for a 2025-admitted student is to ask the department rather than assume the 2022 figure carries over.

Why the unit matters more than the number

Four subjects and 16 credits are only the same thing if every subject is worth exactly four credits. They are not.

four 4-credit failures   = 16 credits   → at the line, permitted
five 3-credit failures   = 15 credits   → under the line, permitted
five 4-credit failures   = 20 credits   → over the line, not permitted

Look at the first two rows. Five failed subjects passes the gate; four failed subjects can sit exactly on it. Any answer phrased as a count of subjects is therefore unreliable for a 2022-admitted student — you have to add up the credits of the specific courses you failed, which means checking the credit column of your own scheme's table rather than counting lines on your marks card.

The threshold is "more than 16", so 16 itself is inside it. That is the kind of detail worth reading twice before you decide you are safe or sunk.

The gate is a first-year gate

This is the part that gets lost. The threshold applies to the first two semesters. From the third semester onward, the 2022 regulations permit carrying failures forward irrespective of the number of F grades.

So the rule people fear — being held back for accumulating backlogs — is specifically about surviving first year. A student in the fifth semester with a pile of arrears is not in the same position as a student in the second semester with the same pile, and the regulations treat them differently on purpose.

The final year has its own gate

Separately, admission to the seventh semester requires having passed all your first- and second-semester courses. Nothing about credits here — it is absolute.

Between the two rules, your first year is not a year you can put off settling. The third-semester gate counts credits, the seventh-semester gate counts whether you have cleared them at all.

When you can actually re-sit

This is where the "supplementary" framing misleads people into thinking they have to wait a year. VTU runs three examination cycles, not two:

Odd semester     August – December
Even semester    January – May
Summer semester  June – July   (undergraduate only)

The summer semester exists precisely for this purpose: it is open for courses of previous semesters in which a student holds an F or AB grade. So a subject failed in the odd semester can be re-attempted in the next cycle rather than a full year later.

On attempts

There is no numeric cap on attempts that we could find in the regulations, for either the 2018 or the 2022 text.

What does exist is a provision about dropping a course, and it is widely misread as a limit on attempts. Under the 2022 regulations, a student who has failed a non-core course even after four attempts may — may, not must — replace it with an alternate course of equal credits, up to two courses over the whole programme. Re-registering the same course again remains an option.

That is a relief valve, not a deadline. It is also restricted to non-core courses, so it will not rescue you from a failed mathematics paper.

What this does not cover

Three things, so you know where the edges are.

The 2025 threshold is not confirmed, as above. The official arrear fee is also not something we could pin down: VTU has notified a revised examination fee structure, but the figures are not published in a form we could retrieve, and the ₹300–₹400 per subject that circulates comes from college circulars rather than the university. Registration is charged per course, and the 2022 regulations cap registration at 28 credits in a semester including backlogs.

And nothing here is a substitute for your department's reading. Where the university fixes a total and a threshold, departments still decide how the internals inside that total are conducted — so the two sources answer different questions.

Keeping track of it

Counting credits rather than subjects is not something anyone does reliably from memory across two semesters and a stack of marks cards.

One VTU keeps your semester-wise results and your backlogs in one place, tracks each attempt rather than overwriting the last, and shows what is still outstanding per subject. Free on Android.