Plymouth vs Cardiff: The After-Tax BTL Yield Comparison Most Hotspot Pages Skip

If you are weighing your next BTL between Plymouth and Cardiff, the headline yield ranking on the property portal is not the decision you are actually making. The cash you hand over at completion, the regulatory cost that compounds across the hold, and the tenancy regime your practices have to clear are different enough on the Welsh side that a like-for-like rent figure can land you in a materially different after-tax position. Two £200,000 flats, identical on paper, can carry a different tax-and-compliance bill from the day you complete.

Why does the city you pick change your tax?

Most "hotspot" pieces present the yield-and-growth picture as the answer. If you are comparing two cities inside one jurisdiction (Plymouth vs Manchester, Cardiff vs Bristol), the tax inputs largely match and the headline figure is close to the operative answer. Cross the border (England with Wales, England with Scotland, or any mixed-jurisdiction portfolio) and the underlying tax layer diverges meaningfully. SDLT is reserved to Westminster; LTT in Wales is devolved to the Senedd and the Welsh Revenue Authority. LBTT in Scotland is devolved to the Scottish Parliament and Revenue Scotland. Northern Ireland operates SDLT. Each devolved regime sets its own bands and surcharges, with different replacement-of-main-residence windows, different relief architectures, and (on the Welsh side) no nil-rate band on Higher Residential Property transactions.

Buy in one jurisdiction and the only question is what that jurisdiction charges. Buy across two, as you are here, and the real question is the differential: how much more (or less) does one city cost you on entry, and where does each sit once the whole post-tax stack is in. That is what the Plymouth-Cardiff comparison below makes visible.

SDLT vs Welsh LTT: the cash differential on purchase

In England (Plymouth), you pay Stamp Duty Land Tax under Finance Act 2003 Part 4. Standard residential bands apply, plus the additional-dwellings surcharge under FA 2003 Sch 4ZA, increased from 3% to 5% on 31 October 2024 under the Autumn Budget 2024 reforms in FA 2024. The 5% surcharge bites on the full consideration where you are buying an additional dwelling. If you are a non-UK-resident purchaser, a further 2% non-resident surcharge under FA 2003 Sch 9A sits on top, triggered by the SRT-aligned test in Sch 9A.

In Wales (Cardiff), you pay Land Transaction Tax under the Land Transaction Tax and Anti-avoidance of Devolved Taxes (Wales) Act 2017 (LTTADA 2017). Main residential rates sit at Schedule 1; Higher Residential Property (HRP) rates (the Welsh equivalent of the additional-dwellings surcharge) sit at Schedule 5. The HRP regime gives you no nil-rate band on HRP transactions: every pound of consideration is charged from £1 upward at the HRP rate stack. The Welsh Government has used its devolved-tax powers to set rates that diverge from English SDLT at both the standard-rate end and the HRP end. There is no Welsh equivalent to the FA 2003 Sch 9A 2% non-resident surcharge; the Welsh side is a single layered HRP charge.

Take a worked example. Mr Patel is a UK-resident higher-rate-band landlord who already owns his main residence. He is choosing between a £200,000 BTL in Plymouth and a £200,000 BTL in Cardiff. Both are second properties for him; both trigger the additional-dwellings layer.

• Plymouth (England SDLT, current rate stack). Standard SDLT calculated on residential bands: 0% on the first £125,000 and 2% on £125,001 to £250,000. On £200,000 that is £125,000 × 0% plus £75,000 × 2% = £1,500. Additional-dwellings surcharge at 5% on the full £200,000 = £10,000. Total SDLT: £11,500.
• Cardiff (Welsh LTT HRP, current rate stack). HRP rates apply from £1 upward with no nil-rate band. Check the live rate stack against the Welsh Revenue Authority LTT calculator at lttcalculator.wra.gov.wales for the exact charge on the £200,000 second-property purchase. At lower price points, the Welsh HRP regime can exceed the equivalent English additional-dwellings SDLT in absolute terms, even though Wales's headline standard-rate bands look more generous at the same price point.

This is not about declaring a winner. The point is that the portal's headline yield ranking never nets off the cash you hand over at completion, and that gap between the two cities is a real number hitting your year-1 return on invested capital before you collect a single month's rent.

The 4-year Welsh refund window vs the 3-year English window

Both jurisdictions let you reclaim the additional-dwellings surcharge where your purchase is really a replacement of your main residence (the surcharge is aimed at genuine additional dwellings, not at a replacement caught by a timing overlap between buying the new home and selling the old one).

In England, FA 2003 Sch 4ZA para 3 with para 8 gives you 3 years from completion on the new property to sell the old main residence and claim back the 5% additional-dwellings surcharge.

In Wales, the higher-residential refund window runs to 4 years from completion on the new property. That extra year can matter if you are sequencing a cross-border move and the sale of your old main residence drags.

If your replacement is in England and the old main residence was in Wales, or the other way round, the refund timing follows the jurisdiction of the surcharge you are reclaiming. Plan the sale-and-purchase sequence against that jurisdiction's window, not the other's.

Council tax second-home premium: Plymouth's LURA 2023 vs Cardiff's Welsh framework

Both councils have used their second-home and long-term-empty premium powers hard, but on different statutory bases.

In Plymouth (England), Levelling-up and Regeneration Act 2023 Part 4 amends LGFA 1992 s.11B to let English billing authorities apply a premium of up to 100% on second homes (with a 12-month exemption on purchase) and on long-term-empty properties (with a threshold around 12 months of continuous emptiness). Plymouth City Council publishes its premium policy and current percentages; check the exact rate for the relevant tax year at plymouth.gov.uk before you model cash flow.

In Cardiff (Wales), the framework sits at the Local Government Finance (Wales) Act 2024 (and earlier reforms), letting Welsh councils apply a premium of up to 300% on second homes and long-term-empty properties. Cardiff Council publishes its policy and current percentages; check at cardiff.gov.uk before you model. The Welsh exemption set differs from the English one, and the higher ceiling means a property classified as a second home can cost you materially more to hold than the English equivalent.

Here is the point that catches people out: the premium attaches to how the property is used, not to who owns it. Let it to tenants under a tenancy agreement and you are typically outside premium scope while that tenancy runs. The trap is a property you use as your own second home (premium applies) or one sitting long-term empty (the trigger is around 12 months on both sides; short voids between tenancies usually stay in the standard band). If you run an actively-let portfolio with brief turnovers, neither council's premium is your load-bearing cost. Hold a property empty, or use it as a holiday or second home, and both premiums bite, with the Welsh ceiling making Cardiff the more expensive side.

Rent Smart Wales (Cardiff) vs Plymouth selective licensing (designated wards)

In Wales, Housing (Wales) Act 2014 Part 1, ss.1 to 7 requires you to register with Rent Smart Wales for every Welsh let. You must then either hold a landlord licence yourself (which means completing approved training) or appoint a Rent-Smart-Wales-licensed managing agent who holds the licence on your behalf. There is no single-property exemption and no portfolio threshold; the obligation arises on your first Welsh let. If you live in England and own a single Welsh property, you are caught.

In England, Housing Act 2004 Part 3 selective licensing applies only in wards the local authority has designated under a designation order. Many Plymouth wards are not covered, so if your Plymouth property sits in an undesignated ward you have no Part 3 licensing obligation at all. Check Plymouth City Council's current selective and additional HMO licensing designation orders at plymouth.gov.uk against your specific property address.

The cost shapes differ. Rent Smart Wales registration and licensing are mandatory across the whole of Wales; the current fees at rentsmart.gov.wales (registration plus licence) apply to every Welsh let you hold. Plymouth selective licensing only costs you anything if the property sits in a designated ward, and the fee structure varies per designation order. So Wales is a steady annual cost you can count on, whereas Plymouth is binary: zero, or a fee if you happen to be in a designated ward.

HMO licensing and Cardiff Article 4 directions

Mandatory HMO licensing under Housing Act 2004 Part 2 applies UK-wide where the property is occupied by 5 or more unrelated occupants forming 2 or more households and sharing basic amenities. That Part 2 floor is the same in Plymouth and Cardiff.

On the Plymouth side, selected wards can add additional HMO licensing under Housing Act 2004 s.56, capturing smaller HMOs below the 5+/2+ Part 2 threshold. Check Plymouth City Council's additional HMO licensing designation orders against your specific property.

On the Cardiff side, Article 4 directions in Plasnewydd, Cathays, and Roath remove the permitted-development right to convert a Class C3 dwelling-house to a Class C4 small HMO without planning permission. In those wards, turning a single-let into an HMO means a planning application, with the cost, delay, and refusal risk that brings. The student-let market in Cathays and Plasnewydd is shaped by these directions, so if you are eyeing an HMO conversion in the catchment, price in the planning step before you assume those HMO yields are yours to take.

Section 24 and CGT: uniform UK-wide, no jurisdictional benefit

One thing landlords get wrong often enough to flag: Section 24 does not change when you cross into Wales. The finance cost restriction under ITTOIA 2005 s.272A applies UK-wide. There is no Welsh version, no English variant, no devolved differential. Hold a Cardiff BTL as an individual or partnership member and s.272A hits your share of the rental profit exactly as it does on a Plymouth BTL. The 100% restriction on your interest deduction and the 20% basic-rate credit on relievable finance costs apply identically.

CGT residential bands behave the same way. TCGA 1992 with FA 2024 sets residential CGT at 18% on gain falling in the basic-rate band and 24% in the higher-rate band from 30 October 2024. The 60-day in-year residential CGT reporting under TCGA 1992 Sch 2 paras 6 to 12 applies UK-wide. The Annual Exempt Amount applies once per individual per tax year, whatever mix of jurisdictions your disposed properties sit in.

So you have no income-tax or capital-gains lever from choosing Plymouth over Cardiff or the other way round. The whole differential is concentrated at SDLT vs LTT on purchase, the council-tax premium on hold, and the licensing fee on hold. Everything else in the tax stack stays the same.

Tenancy regime: RRA 2025 (England) vs RHWA 2016 (Wales)

The trap on a cross-border portfolio is assuming the English Renters' Rights Act 2025 framework reaches your Welsh property. It does not, and getting that wrong is how landlords end up non-compliant.

In England (Plymouth), the Renters' Rights Act 2025 abolishes Section 21 no-fault notices for new tenancies, converts most existing fixed-term assured shorthold tenancies to periodic tenancies, introduces a PRS database and a Landlord Redress Scheme, and extends Section 8 mandatory grounds. Commencement is staged, so it affects new tenancies and (after a transitional window) your existing AST stock.

In Wales (Cardiff), the Renting Homes (Wales) Act 2016, in force since 1 December 2022, replaced the Welsh assured-shorthold framework with an occupation-contracts regime. Welsh tenancies sit under standard, secure, or introductory occupation contracts, and the no-fault notice mechanics, possession grounds, and tenant protections differ from RRA 2025 in ways that matter. Carry your English practices straight over to a Welsh property and you risk non-compliance on the Welsh side; carry Welsh practices into England and you misread the post-RRA-2025 English position.

The practical answer is to run two separate tenancy frameworks. Your Welsh property follows RHWA 2016 with Rent Smart Wales licensing. Your English property follows RRA 2025 with Plymouth selective licensing where designated. The tenancy documents, notices, and possession routes are distinct on each side, so keep them distinct.

Plymouth opportunity zones: regeneration corridor and student-let demand

Plymouth's regeneration around the city centre, the waterfront, and the University of Plymouth catchment drives student-let and young-professional demand. If you are buying regeneration-corridor stock, a few reliefs are worth knowing about:

• Capital allowances on plant and machinery within the commercial portion of mixed-use redevelopment (CAA 2001 Part 2).
• Structures and Buildings Allowance on qualifying non-residential structures at 3% straight-line under CAA 2001 Part 2A (commercial only; residential excluded).
• Land Remediation Relief on qualifying expenditure cleaning contamination on previously-industrial plots, at 150% deduction (or 50% additional relief above the 100% baseline) under CTA 2009 Part 14. This is a CT-side mechanic for corporate landlords, so take specialist advice before you rely on it.

Cardiff opportunity zones: student catchment and the Welsh regulatory layer

Cardiff's student catchment in Plasnewydd, Cathays, and Roath drives rental demand, particularly for HMO and student-let stock. The Welsh regulatory layer is denser than Plymouth's: Rent Smart Wales mandatory registration and licensing, Cardiff Council's Article 4 directions on C4 to C3 conversions in the student wards, and the higher Welsh second-home premium ceiling all sit on top of the deal.

Welsh Government incentives, including grants for energy-efficiency retrofits, may be open to you; check the current schemes at gov.wales before you build them into the numbers. EPC C 2030 is not yet enacted in either jurisdiction, so confirm the live position rather than assuming the English EPC reform reaches your Welsh property.

The after-tax yield calculation: a 5-year comparison

Here is how the pieces come together if you buy a £200,000 second BTL at 75% LTV with a 5% mortgage rate, pull gross annual rent of £12,000, and hold for 5 years with 5% per annum capital appreciation, as a higher-rate-band taxpayer (40% marginal).

Year 1 cash on purchase.

• Plymouth SDLT: approximately £11,500 (per the worked example above).
• Cardiff LTT HRP: computed at write against the Welsh Revenue Authority LTT calculator; typically materially different from the English figure at the equivalent price point.

Annual cash flow (both cities, gross of jurisdictional regulatory overhead).

• Gross rent: £12,000.
• Mortgage interest (75% × £200,000 × 5%): £7,500.
• Operating costs (insurance, repairs, agent fees, voids): approximately £1,500.
• Rent Smart Wales annual cost (Cardiff only): verify current registration and licence fees at rentsmart.gov.wales.
• Plymouth selective licensing (if in designated ward): typically a multi-year licence fee; verify at plymouth.gov.uk; zero if in an undesignated ward.

Tax (uniform, no jurisdictional benefit).

• Taxable rental profit (no Section 24 deduction of finance cost): £12,000 minus £1,500 (operating) = £10,500.
• Income tax at 40%: £4,200.
• 20% basic-rate credit on finance cost (20% × £7,500): £1,500.
• Net annual tax: £2,700.

Exit (uniform).

• Gross capital gain over 5 years at 5% compound appreciation: approximately £55,000.
• CGT at 24% (residential higher rate from 30 October 2024) less Annual Exempt Amount: applied uniformly.

So your 5-year after-tax yield gap between Plymouth and Cardiff comes down to two things: (a) the year-1 SDLT vs LTT cash on purchase, and (b) the annual regulatory cost (Rent Smart Wales vs selective licensing where it applies). Section 24, income tax, and CGT do not move. At like-for-like appreciation your exit position is the same in either city. The variance you are actually pricing sits at entry and on the regulatory-cost line.

The bottom line on Plymouth vs Cardiff

Pick the city on the fundamentals you care about (yield, growth, demand, the kind of tenant you want), then let the tax-and-compliance layer adjust the number rather than drive the decision. The income tax and CGT are the same in both places. What genuinely differs is the cash you pay on completion (SDLT vs Welsh LTT), the council-tax premium if a property ever sits empty or doubles as a second home, and the licensing cost (Rent Smart Wales across all of Wales, selective licensing only in designated Plymouth wards), with two separate tenancy regimes (RRA 2025 in England, RHWA 2016 in Wales) to run in parallel. Get those four lines right and the headline yield finally means what you think it means.

If you are deciding between a specific Plymouth purchase and a specific Cardiff one, that is exactly the cross-border modelling we do every week. Send us the two deals and we will give you the side-by-side after-tax position before you commit to either.