Full Budget vs Interim Budget: What's the difference? Explained in detail here
As it is not practical for the current government or for the upcoming government to take charge right after the elections to prepare or debate on the full budget and also pass it before the new financial year starts. Hence, the outgoing government announces an interim budget or vote on account in February, followed by a full budget by the new government.
It is not practical for the current government or for the upcoming government to take charge right after the elections to prepare or debate on the full budget and also pass it before the new financial year starts. Reuters