Balance Monthly rate Interest in month DIRT Net interest
€1,000.00 0.375% €3.75 20% €3.00
€2,003.00 0.375% €7.51 20% €6.01
€3,009.01 0.375% €11.28 20% €9.03
€4,018.04 0.375% €15.07 20% €12.05
€5,030.09 0.375% €18.86 20% €15.09
€6,045.18 0.375% €22.67 20% €18.14
€7,063.32 0.375% €26.49 20% €21.19
€8,084.51 0.375% €30.32 20% €24.25
€9,108.76 0.375% €34.16 20% €27.33
€10,136.09 0.375% €38.01 20% €30.41
€11,166.49 0.375% €41.87 20% €33.50
€12,199.99 0.375% €45.75 20% €36.60
(monthly rate = 4.5%/12, actually you should do a little better than this as the interest should be calculated daily? But it will only be a little bit better!).
So you deposit €12,000 over the year and get €199.99 in net interest. (Assuming dirt is calculated on each interest payment and interest is credited monthly).
So that's €16.67 a month.
Sounds very low, doesn't it? I may have gone wrong somewhere? Can't see where though!