HazNúmeros

Guides

Clear articles on renting, taxes, and property investment strategy in Spain.

Real estate
Second Home in Spain: Investment or Expense?
The same beach flat can be a smart investment or a monthly money pit — it depends on how much you'll actually use it, where it is, and who you share it with. A Spain-focused guide, Mediterranean vs. north coast, with sources.
Inheritance
Planning Your Legacy and Inheritance in Spain
Without a will, Spanish law decides who inherits — and an unmarried partner gets nothing. Why to plan ahead, the legal ways to do it, and what actually goes into a Spanish will, with sources.
Inheritance
Receiving an Inheritance in Spain: What to Check, and the Tax Clock That's Already Running
How to find out if you're an heir, the 6-month tax deadline that starts the day someone dies, why your region changes the bill dramatically, and what's different if you're inheriting from a foreign citizen — with sources.
Household finance
Buying Second-Hand Electronics: What to Check Before You Trust the Price
A lower price doesn't mean a lower cost — battery age, worn mechanical parts, and a legal spare-parts clock that may already be ticking can turn a bargain into an expensive repair. What to check, and why a private seller's warranty is weaker than a shop's.
Household finance
Does an MBA Pay Back? Doing the Numbers on Cost, Salary, and Career Change
An MBA can mean €80,000-€250,000+ and up to two years of foregone salary. Here's what the research actually shows on payback period, career switching, the network premium, and why US tuition has exploded — with sources.
Retirement
Should You Put Money in a Pension Plan in Spain? Tax Benefits, and What Experts Also Flag
The tax deduction on a Spanish pension plan is real, but shrank sharply in 2021 and isn't the whole story. What the benefit actually amounts to, how withdrawals get taxed, and the fee drag many advisors warn about — with sources.
Household finance
Preventing Health Costs: What Cheap Habits Save You From Expensive Ones
A €50 dental cleaning versus a €1,500 implant, a €6 pack of cigarettes versus what that money could grow into instead — doing the numbers on the cheap habits that head off expensive problems, and the specialist checkups worth knowing about.
Real estate
What's Driving Real Estate Prices in Spain? Demography, Land, and a Different Kind of Boom
Record immigration, shrinking households, wealthy foreign buyers, and a permitting bottleneck that can't keep up — why Spanish housing keeps getting more expensive, and why most analysts don't call it a 2008-style bubble. With sources.
Household finance
Should You Buy It on Sale Before You Need It? Timing a Purchase You Know Is Coming
Sometimes the smartest use of idle cash isn't investing it — it's spending it early, on something you were always going to buy anyway. Part 6 of the Kitchen-Table Ledger series.
Household finance
Is a 3-for-2 Deal Better Than a Discount on the Second Unit? The Supermarket Math
A "3x2" tag and a "70% off the second unit" tag are both true — and not directly comparable until you divide by the number of units. Here's the math, and why supermarkets design offers this way.
Household finance
Amortization, or the Rent You Pay on Things You "Own"
Nothing you buy is a one-time cost — it's a subscription with an irregular billing date. Part 4 of a five-part series on the economics hiding in ordinary decisions.
Household finance
The Break-Even Point, or When the Annual Plan Actually Wins
Paying more upfront feels worse than paying a little every month, even when the monthly plan is strictly more expensive. Part 3 of a five-part series on the economics hiding in ordinary decisions.
Household finance
How a Mortgage Turns Buying a Home Into Leveraged Investing
A 20% down payment can turn a 10% rise in your home's value into a 50% return on your own money — leverage most people never do the math on. Here's the mechanism, and the recourse-debt catch that comes with it in Spain.
Household finance
Opportunity Cost: The Price of the Nap You Took Instead
The number on the receipt is never the real cost of anything — it's whatever you gave up to get it. Part 1 of a five-part series on the economics hiding in ordinary decisions.
Household finance
Sunk Cost, or Why You're Still Watching That Movie
Money already spent has left the building — it cannot be un-spent by suffering harder. Part 2 of a five-part series on the economics hiding in ordinary decisions.
Household finance
Supply and Demand, and the Exits Nobody Points Out
Surge pricing isn't a conspiracy — it's supply and demand doing exactly what it always does, just filmed at high speed. Part 5 of a five-part series on the economics hiding in ordinary decisions.
Household finance
Total Cost of Ownership: The Concept Behind Every "Should I Buy This?"
The purchase price is usually only a fifth of what something really costs you. Here's the framework — acquisition, operating, and disposal cost — applied to a home, a car, and a lawnmower.
Household finance
How Much Does It Really Cost to Own a Car in Spain?
Depreciation is usually the biggest line item, not fuel — and cost per kilometer, not the annual total, is the number that tells you whether owning still makes sense.
Comparisons
How Much Does It Cost to Keep a House Empty in Spain?
IBI, community fees, insurance, and utilities are only half the bill. The other half — usually the bigger one — is the rent you're not collecting, plus the risks a vacant property carries that an occupied one doesn't.
Foreign investors
Do You Need a Spanish Bank Account and NIE to Rent Out a Property?
If you already own a Spanish property and want to rent it out, here's specifically what's required to operate as a landlord — separate from what's required just to buy.
Yield & profitability
How Buying Costs (ITP, Notary, Registry) Eat Into Your Real Return
The costs of acquiring a property in Spain aren't a rounding error — they typically run 10-12% on top of the price, and skipping them from your yield calculation flatters the number.
Taxes
Deductible Expenses Landlords Commonly Miss on Their IRPF Return
The deductible-expense list for Spanish rental income is broader than most landlords use — a rundown of the commonly recognized categories, and why the exact list is worth confirming yearly.
Foreign investors
A Foreigner's Guide to Buying Rental Property in Spain
An NIE is legally required to buy property in Spain, full stop. Here's the realistic process — NIE, bank account, notary, registry — and what buying property does and doesn't get you in terms of residency.
Yield & profitability
What's a 'Good' Rental Yield in Spain Right Now?
National averages hover in the 6-7% range depending on methodology, but the honest answer depends on what you're comparing against and which risk profile you're buying into.
Yield & profitability
Gross vs. Net Rental Yield in Spain: What's the Real Difference?
Gross yield and net yield answer different questions. Here's exactly how each is calculated, a worked Spanish example, and why the denominator matters more than most guides admit.
Methodology
How HazNúmeros Calculates Rental Profitability
A plain look at the methodology behind our rental yield calculator — what counts as income, what counts as an expense, why we use total acquisition cost as the denominator, and what's deliberately not included yet.
Comparisons
How IBI (Property Tax) Eats Into Your Rental Profitability
IBI is calculated on cadastral value, not market price, and the person who owes it is fixed by law — even if the tenant agrees to reimburse it. Here's how it actually works.
Taxes
How Rental Income Is Taxed in Spain: IRPF Basics for Resident Landlords
For tax-resident landlords, net rental income is taxed at your marginal rate — but only after a reduction that can cut the taxable amount by half or more. Here's the basic shape of it.
Taxes
The 50%/60%/90% IRPF Rental Reduction, Explained
Which reduction tier applies to your rental depends on the contract date, tensioned-zone status, tenant age, and a few other factors — here's the full table and how to read it.
Insurance
Is Landlord Insurance Worth It? A Cost-Benefit Breakdown
A 3.5-6% annual premium sounds small until you frame it against what a real non-payment episode costs — here's how to think through the trade-off with actual numbers.
Taxes
Rental Income Tax for Non-Resident Landlords in Spain
Non-resident landlords pay a flat rate on Spanish rental income — 19% for EU/EEA residents, 24% for everyone else — with a critical difference in what expenses each group can deduct.
Methodology
Our Sources: How We Keep Tax and Legal Data Current
Where the tax, legal, and market figures behind our calculators come from, how often each type is reviewed, and how we label the difference between a legal fact and a market assumption.
Foreign investors
What Does Property Management Cost for Absentee Landlords?
Ongoing management commonly runs 8-12% of monthly rent, plus a separate one-off fee for finding a tenant — here's what's typically included and what costs extra.
Legal
How Much Can You Legally Raise the Rent in Spain?
Rent can only be updated if the contract explicitly says so — and even then, the increase is capped. Here's how the update mechanism actually works under the LAU.
Comparisons
Should You Hire a Rental Agency? Agency Fees Explained
Since Spain's 2023 housing law, the tenant-finding commission legally falls on the landlord in most cases — not the tenant. Here's what that changed and what agency management actually costs.
Legal
Rental Deposit (Fianza) Rules in Spain: How Much, Who Holds It, When It's Returned
The fianza is a legal minimum, not a landlord's choice — how much it is, why it typically isn't just held by the landlord, and what determines whether you get it back.
Yield & profitability
What Counts as a Rental Expense in Spain?
The costs that quietly separate a rental's advertised return from its real one — and the difference between an operating expense and a tax-deductible one, which aren't the same list.
Insurance
Rental Default Insurance vs. Bank Guarantee: Cost Comparison
Both protect a landlord against non-payment, but they cost money in completely different ways — one is a recurring premium, the other ties up capital. Here's how to compare them fairly.
Yield & profitability
Rental Yield by Spanish City: Madrid vs. Barcelona vs. Valencia vs. Málaga
Madrid consistently shows the lowest average rental yield of Spain's major cities, and Barcelona, Valencia, and Málaga run higher — but the real spread lives between prime and peripheral neighborhoods within each city.
Comparisons
Renting vs. Buying in Spain: A Real Numbers Comparison
The buy-vs-rent question usually gets answered with intuition. Here's the actual framework — comparable to how we calculate rental yield — for working it out with numbers instead.
Legal
Fianza vs. Bank Guarantee (Aval Bancario): What's the Difference?
The fianza is a mandatory cash deposit; the aval is an optional extra guarantee with real legal limits. Confusing the two — or assuming any aval is automatically legal — causes real disputes.
Foreign investors
Short-Term vs. Long-Term Rental in Spain for Absentee Owners
Short-term rentals can generate more per night but come with far higher operational demands — a genuinely important trade-off when you're not there to handle it yourself.
Insurance
What Happens If Your Tenant Stops Paying Rent in Spain?
The eviction process for non-payment realistically takes 7-15 months in practice, not the legal minimum you'll see quoted — and there are hard limits on what a landlord can do unilaterally.
Yield & profitability
How Vacancy Months Quietly Wreck Your Rental Yield
A single extra month without a tenant can cost you more than a full percentage point of yield. Why assuming zero vacancy is the most common way rental returns get overstated.
Legal
What Is a 'Zona Tensionada' and How Does It Affect Your Rental?
Tensioned rental zones unlock enhanced IRPF reductions and stricter rent caps — but determining whether a specific address is in one isn't always straightforward.