Moving to the UK is a paperwork problem wearing the costume of an adventure. The country is full of small systems — council tax, Universal Credit, NI numbers, tenancy deposit schemes — that assume you already know how they work. You don't. That's fine. The goal for your first month isn't to master any of it. It's to avoid the three or four mistakes that cost real money.

Week one: get a real address, not a vibe

Before a bank will talk to you, most landlords will lease to you, or HMRC will file you properly, you need a UK address that can receive post. A hostel doesn't count. A friend's sofa, in writing, does.

If you're between permanent places, ask the friend for a short letter confirming you live there, dated and signed. Most banks will accept it alongside your passport. It is not glamorous. It works.

Week two: the three things that unlock everything

In roughly this order:

  1. A UK bank account. Monzo, Starling, or Chase will onboard you from your phone in under an hour, with a passport and that address. High-street banks (Barclays, HSBC, Lloyds) take longer and ask more questions — skip them until you need a branch.
  2. A National Insurance number. Apply at gov.uk/apply-national-insurance-number. It can take weeks. You can legally start work before it arrives; tell your employer your application is in progress.
  3. A SIM that isn't your roaming plan. Giffgaff, Smarty, and Lebara all run on EE or O2 networks and cost a fraction of a contract. No credit check. Pay-as-you-go until you know where you'll be in six months.

A small tell: the cheapest providers in Britain are almost always the ones with the worst advertising. If a network has a prime-time TV budget, you are paying for that budget.

Week three: housing, and the deposit trap

Every legitimate rental in England, Scotland, and Wales protects your deposit in a government-backed scheme. In England it's one of three: DPS, MyDeposits, or TDS. Your landlord has 30 days to register it and send you the prescribed information.

If they don't, that is not a minor admin slip. That is a breach that can award you up to three times the deposit back in court. Ask, in writing, which scheme they used. Keep the reply. This is the single most leveraged sentence you will send as a renter.

Week four: the bills you didn't know existed

  • Council tax. Charged per property, not per person. If you live alone you get a 25% discount. If everyone in the house is a full-time student, it's zero. If you don't tell the council, they charge the full rate.
  • TV Licence. Only needed if you watch live TV or use iPlayer. Otherwise, properly, legally: none.
  • Water. In England it's billed by the water company for your region — you don't choose. Switch to metered billing if you're a small household; you'll almost always pay less.
  • Energy. You inherit whatever tariff the previous tenant had. Read the meters the day you move in. Take a photo. This is the only evidence you have if the supplier later tries to bill you for their usage.

The tax trap nobody warns you about

If you start work mid-year, you'll likely be put on an emergency tax code (1257L W1/M1 or BR). HMRC will sort it out eventually — often months later, as a refund. You don't need to do anything, but check your first three payslips and keep them. If you leave the country without reconciling, that refund leaves with you.

A short list of what not to do

  • Don't pay a holding deposit on a flat you haven't viewed.
  • Don't let an employer pay you "cash in hand" to skip tax. They are protecting themselves, not you.
  • Don't sign up for a phone contract in your first month. Your credit file is a blank page; the deals are bad.
  • Don't ignore letters from HMRC because they look scary. They are almost always a refund.

Month two is easier. You'll have your NI, a working bank account, and a landlord you've mildly intimidated with the phrase "prescribed information." That's most of it.