Aussie mortgage holders should not expect the Reserve Bank of Australia to cut rates for upwards of nine months as inflation has crept up in recent months.

This is the analysis of a leading economist after a consumer confidence survey showed spending has tightened - as many are concerned the central bank may not cut rates in November.

The RBA also warned on Tuesday that inflation in the September quarter may be higher than had been expected after strong monthly inflation figures in July and August .

Monthly inflation lifted to its highest point in a year in July at 2.8 per cent, before jumping to three per cent in August.

NAB’s chief economist Sally Auld said the recent uptick of inflation had made the RBA quite cautious around future rate cuts.

“Our sense is that the Reserve Bank

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