Taxes While Working in the UK and Living in the NL

Hello! I hope this is the right spot to ask this question - it's more related to the UK side of things.

My British spouse and I are thinking of moving to the Netherlands before he loses rights due to Brexit (sigh).

He would still be working his London-based job, though. Do you know how this plays out in terms of taxes? Would he have to pay income tax in both countries? I would certainly hope not! 

Thank you so much!

His employer will want to manage its own risk by getting advice on Dutch employment law, PE (permanent establishment) issues, VAT, Dutch payroll etc. Ask the employer to share that advice with you.

There are other forums dedicated to UK-Europe tax, and this is UK US. But broadly no he won't pay tax twice. One of the countries will take lead as it were on income tax on earned income, probably based on residence. Some countries arrange for temporary tax treatment for those on assignment and this can be advantageous. Having two countries where one can establish state pensions can be advantageous. Investment income and gains and pensions needs care. Didn't follow your implication for lost benefits following Brexit, can't think of any where NL treat non NL and non-EU doms worse than non NL but in EU doms.