Not necessary. If by contributing to SRS, it can bring your taxable income to the lower band, then it will be worthed.
Here is the example.
If after all the allowable deduction, your taxable income is $45,000.
If you do not contribute SRS, you will have to pay tax:
550 + 7% x (5,000) = $900
If you contibute full SRS (12,750), you are lowering your taxble income to $32,250. Hence your income tax fall into the lower band, hence you will only pay
200 + 3.5% x (2,250) = $278.75
Hence you save $621.25, which means 4.87% return
Actually the optimize SRS contribution in this case should be just $5,000
Hence you will only pay $550 tax instead of $900, while only contributing $5000
ROR = 350/5000 = 7%
Of course the higher your income band, the higher the return.
In my opinion, if you can't bring down your tax band by 1 level, not worth to contribute as the money will get lock up for long time... (unless if you are cash rich of course)
it does not matter whether you bring down your tax band by 1 or not.
counter example.
taxable income = 70 k
tax = 550 + 30k* 7% = 2650
with srs
tax = 550 + 18k * 7% = 1810
savings = 840 >621.
easier way of calculating is 12k * 7%
to me it is which band the last 12000 of salary falls into. if it is in the 3.5%, don't waste time. if it is in the 7%, consider. if it is 11.5% or more, then just put it in.
notice we did not consider the 30% rebate. so the savings is reduced by 30%
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