The quarterly survey showed that a net balance of 3.9 per cent of companies revised their PR budgets upward during the April-June period.
This is the highest reading since the survey began to measure PR in the final quarter of 2012, exceeding the 3.4 per cent recorded for April-June 2013.
Overall, marketing budgets recorded an upward revision of 15.2 per cent.
Although this figure is down from last quarter, it is still the second highest recorded growth in the survey’s history.
Spending on internet marketing was higher than any other category, recording a net increase of 14.7 per cent.
The only categories to show negative growth were market research with -2.4 per cent and ‘other’ at 0.0 per cent.
James Goddard, CEO of JJ Marketing, believes this bodes well for continued growth in PR spend for the rest of 2014.
He said: "We are certainly witnessing increased convergence across disciplines and seeing more integration across bought and earned media.
"These figures should send a very upbeat message to the wider economy,"