The report, for the year ending 31 December 2012, shows that voluntary income from donations and membership increased from £9.4m in 2011 to £12.1m in 2012.
The annual report said the increase was "slightly offset" by a fall in legacy funding, from £9.5m in 2011, to £8.8m in 2012.
Overall, the charity, which provides information and support for people with Parkinson’s disease, saw its total income increase from £21.9m in 2011 to £23.9m in 2012.
Paul Jackson-Clark, director of fundraising at Parkinson’s UK, said the reason for the rise in voluntary income was "going back to good, old-fashioned fundraising".
He said the charity had put an emphasis on interacting with its existing donors by holding face-to-face meetings, contacting them by telephone and sending out "really good" thank-you letters.
"We put a lot of time and energy into really thinking about how we welcome, support and involve our supporters," he said.
The increase in donations and membership income was also helped by a data modelling project that identified lapsed donors who had not been contacted for a long time, said Jackson-Clark.
He said the charity had invested in regional fundraisers, who helped people to hold local fundraising events, such as coffee mornings. This had resulted in a rise in income of 30 per cent from regional fundraisers to £120,000 last year, he said.
"I sometimes hear people in the sector talking about regional fundraising as if it’s a by-gone era, but it’s absolutely not," he said.
Although membership fees contributed to the charity’s voluntary income, Jackson-Clark said it had not had a significant effect.
"We’ve seen a steady increase in membership over the past four to five years, but no exceptional increase. We have 37,000 members who pay a £4 annual subscription, although a lot of members add an additional donation to their subscription," said Jackson-Clark.
Overall, Parkinson’s UK invested £4.9m in generating funds, according to the charity’s annual accounts, up from £4.4m in 2011.