Prepare for further rate rises.

That’s the message the Reserve Bank wants home buyers to take from its announcement of yesterday’s 25 basis point rise.

In that  announcement, the bank’s Governor, Glenn Stevens, said it is now appropriate for Australia’s interest rates to be closer to their historical averages.

“Today’s decision is a step in that process,” Mr Stevens added.

He said  Australia’s interest rates are still “lower than average.”

The latest rise, though, is the fourth in five months.

The Housing Industry Association said these rises, together, mean that first home buyers now have to find an extra $216 a month, on average, to get into their homes.

The latest rise took the Reserve Bank’s target rate to 4 per cent.

Australia’s banks and other lenders are expected to pass it on in full.

However the Treasurer, Wayne Swan said Australia’s banks would have “absolutely no justification” for any bigger rises.

He said bank margins had already returned to pre-crisis levels.

Mr Swan said families with a typical $300,000 home loan would have to “stump up” another $50 a month, as a result of yesterday’s rate rise.

Most analysts expect two more increases, of a similar size, in the not too distant future.

That would mean many home buyers would have to find another $100 a month.

Thousands of Australian families will be placed under severe financial pressure, as that happens.

Those whose main  breadwinners are still working part time, will be particularly vulnerable.

Thousands of Australians were shifted from full to part time work, when the global economic crisis struck.

However thousands of Australians, who would like to move back to full time jobs, are still working part time.

Mr Stevens said Australia’s underlying inflation rate had eased, as expected, from its peak in 2008.

But he said now that the risk of a serious economic contraction in Australia has  passed, less monetary stimulus is needed.