On a total return basis landlords have done extremely well, even in the past 4 years under 2% RPZ regime.
It just so happens that, after house prices not far off halved during the recession, Ireland has had a bounce lasting over a decade, so right now the capital value of your rental is high and has risen in recent years. But here's a standard warning "investments can go down in value as well as up".
In evaluating how sensible any investment is you have to look forward and it's dangerous to assume capital value will continue to increase in general, but for owners of rental properties there are a couple of specific reasons to be wary of doing so.
First, your property has a particular valuation, eg you think your rental house would sell currently for 500k. If you feel it a good idea to sell it you can start a process that results in you getting around 500k in your bank account in 6 months or so. But if you re-let that house, under the new rules as soon as the tenancy passes the initial 6m notice period the current valuation of your house falls, depending on the details of it and location, probably to something like 350k or it could be easily lower than that.
You have been hit by a huge illiquidity discount, and you did it to yourself. How does your total return look now?
Now, you might be fortunate and the tenant might choose to move out before you actually do want to sell - in which case you write that discount back onto the valuation of the property and sell it for the 500k. But you might not be. The tenant might just stay, and stay.
And then there's the second thing. There are General Elections and the FF/FG government is tired - the people may decide it's time for a change. The only change relating to rental property on the political horizon is leftward, towards transferring rights from owners to tenants. And one of those political outcomes could easily be an eviction ban whenever a tenant is 'at risk of homelessness' (so almost everyone) which means paying rent would for many tenants become a matter of choice.
How's your income return looking then?
Another one would be an electoral promise to 'give tenants proper security of tenure' by doing away with the small landlords' option to get vacant possession after 6 years (and ditching the 6 year rent reset obviously). Your valuation, that you thought was returning from 350k back up to 500k as you approached your 6 year option to sell with vacant possession, just dived down to 350k again.
Did I say 350k?
No, shouldn't have done that, because the new government, with who knows, maybe PBP or equivalent as junior partner, just converted the RTB rent register into a reference rent system (after all that's what the Housing Commission said it wanted it to be called) in which maybe you have to decrease your rent to the average of 10 examples sent to you be the RTB. Now it's talking about giving sitting tenants the right to buy - at the current 'with sitting tenant valuation' but with all previous rent paid to the landlord deducted from the purchase price.
So the current valuation of your house drops to 250k. How's your total return looking now?
The prospects for any investment are always forward looking. It's a natural human thing to look backwards and thing 'that's done OK - onward and upwards' but you are supposed to just look at the landscape ahead. And when you think about what might be an acceptable total return, you cannot sensibly do so without considering associated risks to that total return.