Vienna duplex at €920,000 and €4,748/month: what am I missing?

G

green_garden

Property investor
€4,748 a month is the number driving this decision. Against a €920,000 purchase price for the 3-bed Vienna duplex, that is €56,976 a year and roughly 6.2% gross.

The property looks sound, but I do not yet know how dependable that rent is or how the lease term affects future vacancy. I have budgeted for management, ordinary repairs, empty periods and a larger maintenance event. Financing terms and insurance could still move the net result considerably.

As this would be our first rental, I’m trying to replace the general impression that the yield looks healthy with evidence from the lease and actual costs. Which figures would you verify first, and what level of net return would make the remaining risk acceptable?
 
The gross calculation is right, but first establish what the €4,748 actually represents. Is it base rent payable to the owner, or an all-in figure containing utilities, common charges or other pass-through amounts? If it is the latter, 6.2% overstates the starting yield before you even apply your allowances.
 
Does the €920,000 include all acquisition costs, and are you buying with cash or financing? Those two answers may change the result more than fine-tuning vacancy by half a percentage point. I’d also want to know whether €4,748 is rent from an existing signed lease or an agent’s expectation.
 
I’m not convinced lease length is the main issue. A long lease may reduce turnover, but only if its terms and rent are sound. Before choosing a target net yield, confirm the duplex’s rental status under the rules applicable in Vienna and whether the proposed rent can actually be maintained.
 
Start with the annual €56,976 and subtract only costs genuinely borne by the owner. Separate recurring building charges, management, insurance, property tax, maintenance and vacancy from tenant-paid items. Then show financing below that line. Otherwise it becomes difficult to tell whether the property itself works or the loan structure is flattering it.
 
Also ask for the building’s recent accounts and planned works rather than relying on appearance. A sound-looking unit does not tell you whether common areas, roof, façade or building systems could require owner contributions. Your larger-repair reserve should reflect that information, not just a generic percentage.
 
Financing sensitivity deserves its own scenario. Run the cash flow with a higher borrowing cost, a short vacancy after tenant turnover and one repair in the same year. The average-year yield may look comfortable while the cash required in a bad year is not.
 
Insurance and property tax are worth confirming, but I’d be especially careful about which common building costs remain with the owner. Request an itemised statement rather than accepting one monthly total. That should also prevent counting a tenant-reimbursed expense as both income and cost.
 
There isn’t a universal net yield that compensates for this. A first rental at €920,000 creates substantial concentration in one property and one tenant household. I would compare the after-cost, unlevered return with your alternatives, then ask whether the extra work, illiquidity and occasional large bill are adequately rewarded.
 
Agreed on separating property return from debt, but cash resilience still matters. If financing is planned, model principal and interest separately and note when terms can change. A deal can have an acceptable unlevered net yield yet still produce negative cash flow under the chosen loan.
 
I would stress the income assumption before debating an acceptable yield: What happens with rent 10% below €4,748? What if reletting takes longer than expected? If the purchase only works at the full advertised rent from month one, the margin for a first rental is thin.
 
One caveat to the vacancy stress: a longer lease can reduce turnover costs, but it can also lock in weak economics or awkward obligations. The lease wording, indexation arrangements and allocation of expenses matter at least as much as the number of years. Those points need local review rather than assumptions.
 
My practical order would be: verify the lease or rental evidence; obtain itemised building charges and recent accounts; identify planned common works; price insurance and tax; confirm management fees; then rerun the model using total cash invested. Only after that would I negotiate against the €920,000.
 
One more modelling trap: if acquisition costs sit outside the €920,000 but are omitted from the yield denominator, the return on your actual cash outlay will be lower than the advertised 6.2%. Keep both figures visible—yield on price and yield on total investment—so nobody talks past each other.
 
That list gets to the real decision. I wouldn’t set an arbitrary net-yield hurdle first and reverse-engineer optimistic expenses to reach it. Build a defensible low, central and stressed cash-flow case, then compare all three with what the same capital could earn elsewhere at a risk level you accept.
 
A useful scale check: every €5,700 of annual owner expense removes roughly 0.62 percentage points of yield when measured against €920,000. That makes it easy to see how several modest items—management, vacancy, insurance and maintenance—can turn the headline figure into something materially lower.
 
If your income or borrowing is in another currency, include exchange-rate risk as well. If everything is euro-denominated, ignore that and keep the model simpler. Either way, retain enough liquidity outside the purchase for vacancy and building work rather than treating the repair reserve as merely a spreadsheet entry.
 
At this stage the deal is neither obviously good nor obviously bad; the €4,748 needs validation. I’d make any decision conditional on three items: sustainable base rent, verified owner-only annual costs, and no unbudgeted building works. If the seller or agent cannot support those, the headline 6.2% is not a sufficient reason to proceed.
 
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