The figures show a miniscule 0.02% of landlords were refused entry to the Landlord Registration Scheme out of more than 200,000 who have signed up.
The figures come from answers in parliament provided by the Scottish Government to MSP Alex Johnstone.
No national registration scheme exists in England or Wales, but the Welsh Assembly Government is consulting on introducing one within a few months.
In England, Labour has pledged to bring in a compulsory landlord registration scheme the next time they win power.
The details of the Scottish scheme from introduction in 2006 to date are:
• 11 landlords reported for prosecution – just 0.005% of the total registered
• 40 refused a licence
• £11.2 million in fees collected from landlords
• £5.2 million paid by the Scottish Government to set up the register
• Running costs of £300,000 to date
• 200,000 landlords signing up to the register
The argument is either the register is not rooting out bad landlords, or the problem is not as great as envisaged by politicians.
Scottish Conservative housing spokesman Johnstone said: “This scheme was set up to root out the kind of rogue landlords that have no place in the industry, but so far it has cost over £400,000 for every landlord who has been refused registration.
“According to this scheme, since 2006, there are only 40 rogue landlords operating in Scotland, however many tenants will have had an altogether more negative experience.
“This farcical programme, introduced with the best of intentions, is failing to deliver at a tremendous cost to the taxpayer.”
The register is also failing to gain support from landlords, who view the scheme as an expensive failure.
Scottish Association of Landlords policy and parliamentary affairs officer, John Blackwood said: “With almost £18 million of government and private funds spent so far with so little result, the scheme is doing little to inspire the confidence either of our members or the tenants who look to us for good accommodation and service.”
