Is it mandatory that all the members of the UTE fulfill solvency?

Ok, let's put a little life to this:

An UTE, or temporary union of companies, is basically when several companies decide to join to try to catch a public contract. It's like pineapple to have more muscle and distribute both the risk and the possible prize. Now, the Million question: Do all the companies that form the UTE have to meet the solvency requirements? Spoiler: almost always yes, but there are nuances.

The general rule is that yes, they all have to demonstrate that they are solvents. Because? Because when you introduce yourself as a group, the administration wants to make sure there is no lazy link. If a failure, the others also respond, so they better be prepared to endure the pull. Nobody loves a partner to escape at the first change, right?

Now, the Spanish law (the famous LCSP, for the geeks of the regulations) leaves the door ajar. There is an article - 64.1, for more signs - that says that you can rely on the solvency of other companies in the group, regardless of whether you are nail and flesh or if you just met in Tinder. Of course, you have to demonstrate that you will really have access to the resources you need to fulfill the contract. It doesn't have to say "my cousin has pasta" if he does not lend it to you.

But beware, that each tender is a world. There are times that the specifications demand that each member of the UTE demonstrate their solvency separately. Other times, it is enough to add strength and present the solvency among all. So, if you don't want unpleasant surprises, read the small print of each call.

In summary: the UTE can play with joint solvency, yes, but do not trust and review the conditions of each tender. Have all the documentation, your clear numbers and, if necessary, seek guarantees or show that you have done similar things before. That then the scares and excuses are not worth before the administration.