There is no national fine, and that matters
No single state rule sets an amount for failing to pick up after a dog. It is urban waste, its management belongs to municipalities, and each council regulates it in its cleaning or public-conduct ordinance.
That is why you see very different figures depending on which page you open, and why many of them never cite the specific ordinance they came from. What applies on your street is whatever your municipality's ordinance says, and that is the only one worth reading.
In Madrid, for example, the duty sits in article 15 of Ordenanza 12/2022 of 20 December, on the cleanliness of public spaces and waste management. The council's page says non-compliance brings sanctions, without publishing the amount. We are not going to invent one: if you need the exact figure it is in the ordinance's own penalty regime.
Where the bag goes, which is where people get it wrong
Picking it up is half of it. The other half is the destination, and there are two very common errors: leaving the tied bag on the ground beside the bin, and putting it in the brown organic container.
Madrid's instruction is to put the sealed bag in a litter bin or in the orange-lidded containers, meaning the residual fraction. Excrement does not go in the organic container despite appearances: it contaminates the compost.
A bag left on the ground beside a bin is worse than not picking it up, because it is still in the street and now it will not break down.
Canine DNA, no longer a curiosity
A growing number of Spanish councils have introduced a canine genetic register: a saliva test recording the dog's DNA, so that a sample collected from the street identifies the owner.
Torrejón de Ardoz runs it as a mandatory register. The test is free until 30 September 2026 and costs 36.30 euros from 1 October, and not having it is sanctioned with up to 750 euros under articles 121.5, 132 and 135 of its environmental ordinance.
The point is not the technology. It is that this changes the nature of the problem: until now, fining someone required catching them in the act, which almost never happened. With a genetic register, the evidence is collected afterwards.
What does apply nationally
Although the fine for not picking up is municipal, the general waste framework is national. Ley 7/2022 classifies abandonment, including littering, as an infraction, and it is the law under which waste abandonment generally is pursued.
For a street-level case the practical route remains the ordinance. We mention the state law so it is clear why some articles quote figures in the thousands: those belong to a different regime and a different scale of conduct.
If the problem is one particular spot
An area that is systematically fouled is rarely fixed by fines alone. It is usually an infrastructure problem: no bins along the usual walking route, no bag dispensers, or a green space with no dog area nearby.
There the useful request to the council is not "issue more fines", it is "this stretch has no bins". And that request is far stronger with a dated, photographed record showing the spot recurs, which is exactly what a CleanSpot report leaves behind.
Sources
What is the fine for not picking up after a dog?
It depends on the municipality, because its ordinance sets it. There is no single national amount. Check your council's cleaning or public-conduct ordinance: that is what applies on your street.
Does the bag go in the brown container?
No. Although it is organic matter, it contaminates the compost. The usual instruction, and Madrid's, is a litter bin or the residual container.
Is registering my dog's DNA compulsory?
Only in municipalities that have introduced it by ordinance. In Torrejón de Ardoz it is mandatory, free until 30 September 2026, with a fine of up to 750 euros for not having it. Check whether your council has it in force.
What about urine?
Many ordinances ask for it to be diluted with water. Madrid recommends this to avoid stains and odours, presented as a recommendation rather than a sanctionable duty.