The country's leading cancer charity has seen its income drop by €600,000 in just one year.
New documents released by the Irish Cancer Society show the charity's income in 2015 was €22.8m - €600,000 lower than in 2014.
The total amount fundraised also took a hit in 2015, with the €15.4m taken in during 2014 decreasing to €14.4m in 2015.
Although the decrease is a significant hit to the cash flow of the charity, the society explained the fall by saying that unique fundraisers had brought the figure up in 2014, such as "the 'no make-up' selfie viral campaign" which generated €1.2m.
The remaining income was raised from earned and investment income (5pc) and government funding (3pc) for the Travel2Care and Quitline services.
Bosses at the charity will now be looking to see how they can increase funding for this year.
In a time when spending at all charities will be analysed, the documents reveal the Irish Cancer Society also spent €24.7m in 2015, an increase of €1.5m from the €23.2m spent in 2014.
Briefing documents accompanied with the financial reports described 2015 as a "challenging year" for the charity.
The significant decline in income forced the charity to dip into reserves.
"Declines in some key fundraising campaigns in addition to overall decline in income experienced across the sector required the society to use some of its reserves to cover growing demand for services and to deliver on its 2015 targets," the statements reveal.
"However, the society maintains these reserves for exactly this purpose. For 2016 the society is looking at ways to grow its overall income."
It adds that the directors of the charity "review income performance on an ongoing basis" and consider this against "expenditure plans and available reserves".