The big banks have made good on promises made last month to increase term deposit rates, but the only increases were for terms of one year or more.If consumers are to benefit from the higher rates they will have to change their behaviour, as most customers take out TDs for terms of around three to six months.According to the latest Mozo Banking Roundup, there was an extremely high volume of TD rates changes in August, following the Reserve Bank of Australia's decision to cut the cash rate by 25 basis points.Mozo said that for terms under 12 months, 91 per cent of the changes were rate cuts. A significant proportion of those cuts were 25 bps and some were more.Bendigo Bank cut its two-month rate by 40 bps, G&C Mutual Bank cut its two-month rate by 35 bps and UBank cuts its one, three and six-month rates by 30 bps.For terms of 12 months and longer the number of rate increases outweighed cuts.Among the big banks, ANZ, Commonwealth Bank and Westpac all now offer three per cent for a 12-month term - increasing their rates by between 55 bps and 65 bps.CBA, National Australia Bank and Westpac are all offering 3.1 per cent for two years - increasing their rates by 45 bps to 60 bps.ANZ is offering 3.2 per cent for two years - an increase of 75 bps.And for three years, CBA, NAB and Westpac are all offering 3.2 per cent - increasing their rates by 50 bps to 60 bps.Other deposit-takers to increase longer-term TD rates include Gateway Credit Union, which increased its 12-month rate by 11 bps to 3.11 per cent. This is the highest 12-month rate on offer.IMB Bank increased its 12-month rate by 60 bps to three per cent and ING Direct increased its 12-month rate by 55 bps to 3.05 per cent.Bank of Queensland increased its two-year rate by 60 bps to 3.25 per cent and Suncorp Bank increased its two-year rate by 30 bps to 3.05 per cent.The top rates include Arab Bank's offer of 3.1 per cent for three months, ME's offer of three per cent for six months, Gateway's offer of 3.11 per cent for 12 months and Bank of Queensland's offer of 3.25 per cent for two years.