Overburning in computer storage is the process of recording data past the normal size limit on a recordable compact disc.

Many disc manufacturers extend a recordable disc to leave a small margin of extra groove at the outer edge. This lead-out was originally intended to provide tolerance for the read head of an audio CD player should it overseek, by providing a padding of up to 90 seconds of silent digital audio.

Recording onto the lead-out is possible with some combinations of CD recorder and CD authoring. The actual amount of data that it will hold depends ultimately on the recordable media and varies somewhat between brands of disc, with some being up to 10% of the total disc capacity.

Almost all CD-ROM drives are capable of reading from the lead-out. For this reason, software publishers have on occasion shipped their software on similarly oversized compact discs to reduce packaging costs. Oversized discs have also used as a form of copy protection because it is more difficult to record copies of them.

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