Matiz,
Yes, persons who work under 30 hours a week can apply for Supplementary Welfare Allowance (including Mortgage Interest Supplement).
It can't be backdated to last October for you, so you should apply as soon as possible.
The general formula shown above will be applied to you as well.
I'm assuming that you're single and have no savings for this example. If you have savings in excess of 20k, some means will be assessed against you.
Your
net income is calculated as gross income less PRSI and reasonable travel expenses.
Your
income in excess is calculated as your
net income minus the
appropriate SWA rate for your family size (currently €204.30 for a single person).
Your entitlement to Mortgage Interest Supplement is calcuated as the
weekly i
nterest minus (
income in excess plus the
minimum contribution). The minimum contribution is currently €18, changes to €24 from June. If this final amount is a plus figure, that is the amount you qualify for. If this amount is a negative figure, you don't qualify.
There are other criteria for qualifying for Mortgage Interest Supplement which can be found
here on the SW website