section 8 of Bharatiya Nyaya Sanhita - Amount of fine, liability in default of payment of fine.

1. Where no sum is expressed to which a fine may extend, the amount of fine to which the offender is liable is unlimited, but shall not be excessive.
2. In every case of an offence––
   1. punishable with imprisonment as well as fine, in which the offender is sentenced to a fine, whether with or without imprisonment;
   2. punishable with imprisonment or fine, or with fine only, in which the offender is sentenced to a fine,
   it shall be competent to the Court which sentences such offender to direct by the sentence that, in default of payment of the fine, the offender shall suffer imprisonment for a certain term, in which imprisonment shall be in excess of any other imprisonment to which he may have been sentenced or to which he may be liable under a commutation of a sentence.
3. The term for which the Court directs the offender to be imprisoned in default of payment of a fine shall not exceed one-fourth of the term of imprisonment which is the maximum fixed for the offence, if the offence be punishable with imprisonment as well as fine.
4. The imprisonment which the Court imposes in default of payment of a fine or in default of community service may be of any description to which the offender might have been sentenced for the offence.
5. If the offence is punishable with fine or community service, the imprisonment which the Court imposes in default of payment of the fine or in default of community service shall be simple, and the term for which the Court directs the offender to be imprisoned, in default of payment of fine or in default of community service, shall not exceed,—
   1. two months when the amount of the fine does not exceed five thousand rupees;
   2. four months when the amount of the fine does not exceed ten thousand rupees; and
   3. one year in any other case.
6. 1. The imprisonment which is imposed in default of payment of a fine shall terminate whenever that fine is either paid or levied by process of law;
   2. If, before the expiration of the term of imprisonment fixed in default of payment, such a proportion of the fine be paid or levied that the term of imprisonment suffered in default of payment is not less than proportional to the part of the fine still unpaid, the imprisonment shall terminate.