Jim Allister and Martin McGuinness are among the latest senior political figures to reveal details of their tax affairs.
TUV leader Mr Allister published his tax returns on Monday night - showing he paid around £8,300 income tax on his assembly salary of £45,616.
The figures also show that he spent just over £4,000 of his own salary to pay his office staff. Mr Allister said the £69,000 allowance towards the cost of running a constituency office was not sufficient to meet the full cost.
The Sinn Fein deputy first minister’s paperwork reveals he paid more than £37,000 in tax on his Stormont salary last year of £111,600.
Publishing the figures on Tuesday, Mr McGuinness reiterated that he takes an industrial wage and donates the remainder to the party.
SDLP leader Colum Eastwood’s decision to publish his tax return led to him discovering he had overpaid his student loan by £700.
Mr Eastwood said he has notified the loan company and the money - understood to have been borrowed during his time at the University of Liverpool in 2001 - will be repaid into his bank account.
He also paid £6,231 tax on his assembly salary of £41,168.
Alliance leader David Ford has also published his tax returns based on his ministerial salary of £86,000
Tuesday’s round of tax document publications follows the release of information by Prime Minister David Cameron in the wake of the Panama Papers leak.
Mr Cameron immediately challenged other senior figures in the House of Commons to do the same, sparking a similar move political leaders in Northern Ireland.
On Monday, First Minister Arlene Foster revealed she paid £20,500 on earnings of almost £80,000 in 2014-15.