Property IBI: what details to check on the bill

Property IBI: what details to check on the bill

The IBI bill is one of those documents that many owners pay without looking at in detail. However, reviewing its details allows you to spot identification errors, check whether the property is correctly linked to the Land Registry, and understand whether the charge is being made on the correct basis. In the IBI, administration is based on the cadastral register information and on the collection documents issued by the town hall, and those details must appear on the bill or payment receipt. In addition, the law assigns town halls responsibility for assessing, collecting and reviewing the tax, as well as managing exemptions and reliefs. TRLRHL, article 77.

There is no need to turn this review into a complicated process. It is enough to follow a set order and compare the bill with the basic information for the property. If you spot a discrepancy, the sensible approach is to keep the receipt and ask for clarification before the error is repeated in future years.

1) Check which property is being taxed

The first section of the bill should let you identify beyond doubt the property to which the IBI relates. This matters because the tax falls on rights such as ownership, usufruct, superficies or certain administrative concessions, and the correct property reference avoids confusion between homes belonging to the same owner.

Pay particular attention to:

1. The full address of the property.

2. The cadastral reference.

3. The basic description of the property, if shown.

4. Whether the bill relates to a home, a commercial unit, a storage room or a separate garage space.

Practical tip: if you own several properties in the same building, do not rely on the amount alone. Always check the cadastral reference and the description to make sure the bill corresponds exactly to the home you think it does.

Common mistake: paying a bill that is correct in amount but assigned to another property or to an annex that does not match what appears in your deed or cadastral information.

2) Check who is shown as the owner or liable taxpayer

For IBI purposes, the liable taxpayer is the person shown as responsible for payment according to the legal position in relation to the property. In practice, the bill usually shows the name of the owner or the taxpayer liable to pay. This is especially relevant where there has been a sale, an inheritance, a division of jointly owned property, bare ownership with usufruct, or a change of ownership that has not yet been reflected in the register.

When checking this detail, look at:

1. Full name or company name.

2. NIF or identifier, if shown.

3. Notification address.

4. Whether the bill is still in the name of a former owner.

If the home has been sold recently, it is worth distinguishing between who pays the bill and who must bear the cost depending on any private agreement between the parties. The person shown on the bill is one thing; what was agreed in the deed or sale contract is quite another.

Practical tip: if the bill is still in the name of someone who is no longer the owner, keep the transfer documents and prepare a request for correction or data update.

3) Check the tax base and cadastral details

The TRLRHL provides that the tax is based on the taxable base, the assessable base, exemptions and reliefs, and that administration starts from the cadastral register. For that reason, even if the bill is not a full technical sheet, it is worth checking that the tax information is consistent with the reality of the property.

What you should look at is:

1. The cadastral value or the reference to the value used to calculate the bill.

2. Whether there is an assessable base and whether it matches the information already notified to you.

3. Whether any relief has been applied.

4. Whether any total or partial exemption appears.

5. Whether there is any surcharge or additional amount you were not expecting.

The bill does not need to explain the full mechanism in articles 60 to 77, but it should allow you to understand where the debt comes from. The tax is built on the ownership of the property, its inclusion in the register, and the tax data managed by the town hall on the basis of cadastral information.

Common mistake: confusing the cadastral value with market value. They are different figures and should not be compared as if they were equivalent.

4) Practical review of the amount and the bill items

A clear bill should allow you to verify the amount without having to make complex calculations. Although we are not going into municipal figures, you can check whether the document includes the usual elements:

1. Identification of the tax.

2. The period to which the charge relates.

3. The principal amount.

4. Reliefs, if any.

5. Surcharges, interest or ancillary items, where applicable.

6. Issue date and payment method.

If you see an item you do not recognise, do not assume it is fine simply because the total looks correct. A bill may conceal a surcharge or adjustment that needs explaining. It is also possible for a relief not to have been applied when it should have been, or for the register not to have been updated after a transfer or cadastral change.

Recommended steps if something looks wrong:

1. Compare the bill with last year’s bill.

2. Check whether there have been changes of ownership, floor area or use.

3. Confirm whether any recognised relief exists.

4. Gather the deed, simple land registry extract, cadastral reference and last paid bill.

5. Ask for clarification before the voluntary payment period ends or incorrect bills build up.

5) What to do if the bill does not match the reality

If the IBI does not match the details of your property, act methodically. The most sensible course is not to ignore the error and not to wait for it to be repeated year after year.

You can follow this plan:

1. Identify the incorrect detail: owner, address, cadastral reference, relief or amount.

2. Gather the documents that prove the discrepancy.

3. Ask the town hall or the managing body to correct the detail or review the bill.

4. If the issue affects a recent transfer, also review the sale documentation.

5. If you need help assessing the impact of an error on your property, you can ask for guidance at /contacto.

If you would also like to compare the indicative value of your property with an online estimate, you can use /valoracion-vivienda-madrid. That estimate is indicative, includes a range and PDF report, and can be followed up with a visit if you need it.

Please note that this guide provides general guidance and does not replace individual advice. Each property may have different issues: an unregistered change of ownership, an exemption awaiting recognition, a property with several uses, or a bill issued with outdated details.

At UBICASA, in Calle Montesa 29, Madrid, we are open Monday to Friday from 10:00-15:00 and 16:00-19:00.

If your aim is simply to review the IBI bill with confidence, the rule is straightforward: check the property, owner, cadastral reference, base and applied items. With those five points, you can usually spot most errors before they become a recurring problem.