Before you start

Passport and an eVisa share code
A UK mobile number
A Cardiff address, for a traditional bank
Proof of that address — an occupation contract, a council tax bill or an employer letter

Step-by-step

1
Open a digital bank account on day one
Monzo, Starling, Revolut and others verify you from a passport photograph and a short video selfie, without proof of address. You get a UK sort code and account number within hours, which unlocks an occupation contract, a salary and a phone contract.
Mobile appWho: YouDay 1
2
Ask HR for an address letter if you want a high-street bank
Most banks accept an employer letter confirming your address in place of a utility bill. Cardiff's universities, the health board and the Welsh Government all issue these routinely for international staff — ask rather than waiting for a bill you cannot yet generate.
Via employerWho: You
3
Register for Council Tax in your first week, and read the band correctly
The occupier pays it, billed separately from rent over ten or twelve instalments. Wales revalued its housing stock in 2005 on 2003 values and added a ninth band, I, at the top — so Welsh bands are not comparable with English ones, and any 'average Band D' comparison across the border is meaningless. Claim the 25% single-occupant discount or the all-student exemption if either applies; neither is automatic.
OnlineWho: YouWeek 1
4
Set up Direct Debits for everything recurring
Rent, Council Tax, utilities, broadband and your phone all run on Direct Debit here, and paying that way is usually cheaper than the alternative. The Direct Debit Guarantee gives you a strong right to reclaim an incorrect payment from your bank.
Mobile appWho: You
5
If you buy, budget Land Transaction Tax rather than Stamp Duty
Land Transaction Tax replaced Stamp Duty Land Tax in Wales on 1 April 2018 — the first Welsh tax in almost 800 years — and is collected by the Welsh Revenue Authority. It has its own rates, its own thresholds and its own higher-rate surcharge for additional properties, all set in Cardiff Bay and revised in Welsh budgets. Use the WRA's own calculator; an English stamp duty calculator will give you a number that has never applied to a Welsh purchase.
OnlineWho: You
6
Know the legal ceiling on what you can be asked for up front
In Wales a security deposit is capped at five weeks' rent under the Renting Homes (Wales) Act framework, and letting agent fees to contract-holders have been banned since the Renting Homes (Fees etc.) (Wales) Act 2019. Anything beyond rent, a capped deposit and a capped holding deposit is a prohibited payment.
OnlineWho: You

Documents you’ll need

Passport
eVisa share code
Proof of a Cardiff address, for a traditional bank
Employer letter, widely accepted as address evidence
UK mobile number

Things most newcomers don’t know

A Welsh Band D and an English Band D are not the same thing.

Wales revalued in 2005 using 2003 values and added a ninth band; England still bands on 1991 values across eight. Every cross-border 'average Band D council tax' comparison you will read therefore compares two different measurements. Look at the actual annual charge for the actual address, which the council publishes, rather than the letter.

Source: GOV.WALES — council tax bands

Buying a home in Wales means Land Transaction Tax, not Stamp Duty.

LTT replaced SDLT on 1 April 2018 and is administered by the Welsh Revenue Authority with its own thresholds and rates, including a different treatment of first-time buyers from England's. Conveyancers know this; buyers running their own numbers off an English calculator regularly budget the wrong figure by thousands.

Source: GOV.WALES — Land Transaction Tax overview

Digital banks solved the address circularity and are now the standard route.

High-street banks want proof of an address a new arrival cannot produce, while landlords want a UK account. Monzo, Starling and Revolut open on a passport and a selfie. This stopped being a workaround years ago; it is simply how newcomers get a UK account.

Source: community-reported

Cardiff has an unusually deep financial-services bench for its size, which helps at the counter.

Admiral is headquartered here, Principality is the largest building society in Wales, and Legal & General and several banks run large Cardiff operations. Branch and telephone staff deal with international arrivals routinely, and Welsh-language service is available from most of the public-facing institutions if you want it.

Source: community-reported

Common mistakes to avoid

Comparing a Welsh Council Tax band with an English one as though they measured the same thing.
Budgeting Stamp Duty for a Welsh house purchase instead of Land Transaction Tax.
Not claiming the 25% single-occupant discount or the all-student exemption.
Trying a high-street bank first, before you have any proof of address.
Paying a monthly fee for a current account when free ones are the norm.

Some of this may be out of date. Spotted something inaccurate? Help us keep it right for the next newcomer.