Can I contribute experience as a subcontractor to prove solvency?

Of course, you can use the experience as a subcontractor to demonstrate solvency in a public tender ... but, you know, it depends a lot of the rules of each place and each contest. It is not an exact science. Sometimes they accept it without problem, other times they ask you to the birth certificate of your company and a jury testimony of your grandmother.

The roll of "solvency" is basically that you can prove that you are not improvised and that, if they give you the contract, you will not disappear on the third day or leave the project halfway because you run out of funds or without knowing what to do. And well, that solvency can be proven in several ways: showing your numbers (financial statements, for example), Bank letters, past contracts ... and, yes, experience as a subcontractor, if it is relevant and you have how to verify it.

Of course, eye: your experience as a subcontractor has to have something to do with the tender theme. That is, do not put plumbing work if the tender is to do software. If the call is to build something, and you have already been subcontractor in similar works, you are going well. But if the experience has nothing to do, or bother, because they will hit you.

And here is the disclaimer: each country, each city, each public body has its own rules manual, and sometimes change from one contest to another. On some sides they are super strict and do not accept you more than experience as the main contractor. In others, while you show that you participated and fulfilled, you are already on the other side.

Do not forget to put together all possible papers: contracts, invoices, recommendation letters, even photos if you can. Because if you don't have how to try what you did, it is as if it hadn't happened. That sad.

Anyway, you can, but it is not a guarantee. Chécate the contest bases well, make sure your documents are in order and that your experience applies. If you do not understand anything they ask for, or play it: better ask a lawyer or an advisor who knows these issues. It is not going to be that you waste time (and money) for a badly presented paper.