Sweden is one of the only countries in the EU that does not demand financial openness from its political parties, and this has been criticised by anti-corruption group Transparency International.
On Thursday the parliament's constitutional committee, made up of all parties, discussed the issue. The Moderate Party and the Christian Democrats are firmly against a change in the law, and the other two parties in the governing Alliance - the Center Party and the Liberal Party changed their stance and decided to agree.
Since the far-right Sweden Democrat party is also against any law on political funding, the status quo will remain unchanged.
Both the Social Democrats and the Moderates have long been opposed to rules revealing party funding.