The convincing rental application: what landlords really want to see

In a tight market, a flat is often decided in a single afternoon. A viewing draws dozens of applicants, and the landlord makes the shortlist not on charm alone but on who leaves the fewest open questions. A complete, honest application folder is therefore not bureaucratic ballast – it's your strongest argument, because it removes exactly the risk the landlord fears.

At the same time, you don't have to disclose everything that gets asked somewhere. Data-protection law draws clear lines, and Germany's General Equal Treatment Act bans certain questions outright. This guide shows you what truly belongs in the folder, what you can leave out with a clear conscience, and how to win with completeness and honesty without making yourself transparent as glass.

What belongs in a complete application folder#

A convincing folder is above all one thing: complete without being overloaded. The landlord wants to see at a glance that the rent is secured and that you'll be a reliable tenant. In practice, six building blocks do that.

• The Selbstauskunft (tenant self-disclosure form). The centrepiece. Here you confirm your name, address, occupation, household size, number of people moving in and income. Many landlords hand out their own form; otherwise a clean version of your own will do.
• Proof of income. Usually your last three payslips. The self-employed add their latest tax assessment or a current business analysis (BWA).
• Proof of creditworthiness. The SCHUFA-BonitätsCheck – the landlord-facing version that shows only the essentials (more on this below).
• Mietschuldenfreiheitsbescheinigung (certificate of no rent arrears). A confirmation from your current landlord that you have no outstanding rent debts. Customary, but not enforceable – again, more below.
• A copy of your ID. Only relevant once you make the shortlist. It has no place in the first contact.
• Optionally a guarantee. If your income is tight – as a student or career starter, say – a parental guarantee can round out the picture. But it supplements proof of income, it doesn't replace it.

A German tenancy contract is simple at its core: under § 535 BGB the landlord hands you the flat for use, and you pay the agreed rent. All the folder has to do is make that exchange credible – nothing more.

The "about me": the cover letter that sticks#

Numbers decide the shortlist, but a good cover letter often decides who, out of three equally strong applicants, gets the keys. It's your chance to turn a file into a person.

Keep it short and concrete. Say who you are, what you do for a living, why this flat in particular fits, and how long you expect to stay. Landlords value reliability – a note about a permanent employment contract or a wish for a long-term home lands harder than any platitude. Avoid exaggeration and invented stories; they unravel at the latest when you meet in person.

The cover letter doesn't sell the flat to you – it relieves the landlord of the worry of handing the keys to the wrong person.

Sending the cover letter with your very first message through a portal already sets you apart from the standard "Is the flat still available?". How to phrase that first message is something we go deeper on in Messaging the landlord: the first message that lands.

The 3× cold-rent rule and the SCHUFA check#

Most landlords check creditworthiness with a simple rule of thumb: net income should be at least three times the cold rent. For a 700 € cold rent, that's 2,100 € net. It isn't required by law – but it's the de-facto standard your documents are measured against. How to calculate your realistic budget from the bottom up is covered in How much rent can you afford?.

With proof of creditworthiness it pays to be precise – otherwise you accidentally hand over more than necessary. There are two SCHUFA documents that get mixed up all the time:

In practice: order the free data copy first to review your data and have any incorrect entries deleted. For the folder you then use the BonitätsCheck – it's the clean, third-party-ready documentQuelle.

The certificate of no rent arrears – customary, but not enforceable#

Here's an important subtlety many people don't know: your current landlord is not obliged to issue you a Mietschuldenfreiheitsbescheinigung. The Federal Court of Justice (BGH) ruled that no such claim exists – a binding statement about outstanding amounts could disadvantage the landlord, for instance in the operating-cost settlement Quelle.

If your former landlord refuses, you're not stuck. Under § 368 BGB you're entitled to a receipt for payments made, and bank statements showing your on-time rent transfers over recent months are a full substitute. Redact anything on them that's none of the landlord's business.

What you may leave out – data protection and data minimisation#

You don't have to answer everything you're asked – and much of it you shouldn't volunteer in the first place. The GDPR requires data minimisation: a landlord may only collect what is strictly necessary for that specific step in the selection process. Germany's data-protection authorities translated this into a staged model in an official guidance note Quelle.

This gives a clear line for your folder: what you do not have to disclose up front includes your family planning, complete bank statements with every transaction, your account balance or your full SCHUFA profile. On payslips, redact items like union dues or wage garnishments that are irrelevant to paying rent – what matters is the net figure.

Which questions landlords aren't allowed to ask#

Some questions aren't just rude – they're simply forbidden. Germany's General Equal Treatment Act (AGG) prohibits, in § 19 AGG, discrimination in letting on grounds of ethnic origin, gender, religion, disability, age or sexual identity Quelle. For ethnic origin the protection is watertight; for smaller landlords with up to 50 flats the ban narrows to racist discrimination.

Combined with the GDPR, this produces a list of questions you don't have to answer – and may even deliberately answer untruthfully, without fearing termination or rescission (the "right to lie"):

1. Pregnancy and family planning. Whether you want children is none of the landlord's business.
2. Religion, origin, nationality. Classic AGG features – off-limits.
3. Party affiliation, club and union membership. Political and ideological ties are irrelevant.
4. Illnesses and disabilities. Health data is specially protected.
5. Criminal record. A blanket question about this is impermissible.
6. Marriage plans and sexual orientation. Private matters with no bearing on the tenancy.

Your folder in five steps#

Here's how to build an application folder that's complete without exposing you:

1. 1

   Request SCHUFA early

   Order the free data copy first, check it for errors and have incorrect entries deleted. For the folder, get the BonitätsCheck – it should be no older than three months.

2. 2

   Prepare proof of income

   Your last three payslips (self-employed: tax assessment/BWA). Redact irrelevant items, leave the net figure in place.

3. 3

   Secure proof of rent payments

   Ask your former landlord for a certificate of no rent arrears – and if they decline, keep bank statements with your recent rent payments ready.

4. 4

   Write the self-disclosure + cover letter

   Fill in the Selbstauskunft honestly, but don't answer impermissible questions. Add a short, personal cover letter.

5. 5

   Bundle into one PDF

   Combine everything into a tidy PDF, in a sensible order, named with your name. A folder graspable in two minutes beats three loose attachments.

Just how big the competition really is is shown in How many applicants are there per rental flat? – and whether and when to follow up after the viewing is covered in Did I get the flat?.

Common mistakes that cost you the keys#

Even good applicants forfeit chances in avoidable places. These five show up most often:

1. Incompleteness. If the credit check or income proof is missing, the folder often goes straight onto the "later" pile – from which little ever returns. Completeness beats speed only when both come together.
2. Too much of a good thing. Complete bank statements, the unredacted data copy or an ID copy at first contact don't look confident – they look naive, and you give away sensitive data for nothing.
3. Outdated documents. A year-old SCHUFA or last year's payslips devalue the folder. Keep everything no more than three months old.
4. Glossing over instead of explaining. Honestly framing a gap in your CV or a tight income lands harder than an invented story that collapses when you meet.
5. Data silo instead of reuse. Assembling everything from scratch for each flat makes you too slow. A digital folder maintained cleanly once can be shared in seconds – which is exactly where WOHNO comes in.

That's exactly what the WOHNO application file is built for: you maintain your self-disclosure, your proofs and your "about me" once and release them stage by stage – identity early, sensitive documents only when things get serious. A completeness score shows you in advance where your folder still has gaps, and landlords see at a glance that budget and creditworthiness fit. Instead of sending the same documents 80 times over, you apply with a single click – data-minimal and convincing all the same.

Take the check and see in 60 seconds how strong your folder already is:

Build your application folder once, reuse it forever

Maintain your self-disclosure, your proofs and your 'about me' once in your WOHNO folder. Landlords see at a glance that budget and creditworthiness fit – and you skip the endless paperwork shuffle.

Create your folder

FAQ – frequently asked questions#