Annuity deposit rates: income banded percentage obligations with statutory caps on payable deposits. Rates and maximum payable annuity deposits are prescribed by graduated income bands: each band imposes a percentage of adjusted total income as the required deposit while provisos cap the payable amount by aggregating a fixed-percentage calculation on the lower portion of income with one-half of the excess over the band threshold. 'Total income' is defined as income computed under the Income tax Act without allowance under section 280O.