Mandate amount can be either fixed or maximum. eMandates can have an amount of up to Rs 1 lakh. Physical mandate can have an amount of up to Rs 1 crore.
NACH Debit mandates require an amount. For eMandates, this amount can be up to Rs 1,00,000 (one hundred thousand). NPCI will likely revise this limit upwards in 2020 subject to RBI approval. For physical mandates, this amount can be up to Rs 1 crore.
A mandate must have a fixed amount or a maximum amount (one or the other, but not both).
Fixed amount: The payment can be of this amount only, nothing more and nothing less.
Maximum amount: The payment can be any amount up to and including this maximum amount, nothing more.
When you create a mandate, you'll need to choose between 'Fixed amount' and 'Maximum amount'.
If the payments may vary from period to period, you should use 'Maximum amount'.
Increasing or decreasing the mandate amount: NACH Debit allows amendment to mandate amount. However, LotusPay does not support mandate amendment, as it is easier to simply cancel the mandate and create a new one.