The Irish Times has the self-declared amounts spent by the various parties and groups on the Lisbon II campaign.
AT LEAST 3.5 million was spent by the main groups campaigning for and against the Lisbon Treaty, while the Referendum Commission spent under 4 million. Political parties said they spent about 1.47 million, including contributions from European Parliament groups, while various civil society groups and corporations revealed spending of about 2 million.
From the IT report
The cost: what the main groups spent
YES
Fianna Fail 500,000
Fine Gael 300,000
Labour 200,000
Green Party 13,000
Ireland for Europe 500,000
Ryanair just under 500,000
Intel 300,000
We Belong 250,000
Ibec 150,000
Generation Yes 30,000
NO
Cóir 250,000
UKIP 190,000
Libertas 100,000-120,000
Sinn Féin 100,000
Socialist Party 55,000-60,000 No To Lisbon 30,000
Peoples Movement 20,000
People Before Profit Alliance
under 10,000
National Platform 3,000
OTHER
Referendum Commission under 4 million
Department of Foreign Affairs 700,000
European Commission at least 150,000
Figures supplied by individual parties and groups