We are also childless and will remain so, and Wohnriester (loan! not Bauspar-Wohnriester!) is definitely worthwhile. It’s not just about the rather meager allowances of just under 300 euros annually for a couple, but above all about the tax-free repayment contributions.
If you repay, for example, 4200 euros annually with the normal loan installments for the house, and I think you can definitely manage that (that would be less than 400 euros per month repayment portion), then these 4200 euros are tax-free. At a 20% tax rate, that’s almost 800 euros that you have in addition. Plus the allowances, so that’s 1100 euros more in your pocket annually compared to a non-Wohnriester loan.
Of course, at some point you have to pay back taxes on these amounts. However, later in retirement, when this repayment taxation occurs, we will hardly exceed the tax-free allowance threshold under which you even have to pay taxes. Usually, you have significantly less income in retirement than in working life. So for us, the repayment taxation will probably not apply at all. But even if it doesn’t go away, it hardly matters; you can also have this calculated (there are plenty of examples on the internet).
The Wohnriester loan also does not have to be more expensive than the normal building loan; after the first fixed interest rate period expires, we will definitely switch to Wohnriester, which will be in 2.5 years (fixed interest rate 5 years). Until then, unfortunately, the allowances and the tax freedom initially expire, but it simply isn’t worth taking out another Riester contract for 2-3 years now, and besides, it’s impossible for us to save 4200 euros annually alongside the house financing. With Wohnriester, this would be eliminated because the repayment automatically counts as a savings contribution.
However, we already have a house; if a house purchase/construction is not planned, Wohnriester, in my opinion, does not make sense, because I would never sign up for a Bauspar contract again (currently we still take the housing construction premium, but apart from that a Bausparer really only has disadvantages: hardly any interest, closing fees every few years, inflexible).