6+ How To Calculate Rent Increase. You can use this calculator to determine or confirm whether proposed rent increases are legal. Enter the current cost of rent and the previous cost of rent into the calculator.

You can use this calculator to determine or confirm whether proposed rent increases are legal. For example, suppose you use the previous calendar year and the cpi rate was 3.50 per cent. To find out how much the rent should be to at least keep pace with the consumer price index (cpi), enter the rent per annum that you are receiving/paying at present.







