Rental accounts, UK property pages and filing
Landlord Tax Return Accountant in Cardiff
We prepare the rental-income calculation from your tenancy, agent, bank, mortgage and expense records, then complete the property pages within your Self Assessment return. Ownership, finance costs and capital expenditure are checked before the figures are filed.
For first-time landlords, established portfolios, joint owners, HMO landlords and UK property owners living overseas.
Establish the reporting duty
When does a landlord need to report rental income?
Rental income is not judged only by the cash left after the mortgage. The reporting position begins with gross property receipts, allowable expenses and whether HMRC has issued a notice to file.
Check the official rental-income reporting rules ↗The property allowance may cover the income
The allowance is not available in every situation and it cannot be used alongside actual property expenses for the same income.
HMRC normally needs to be told
How the income is reported depends on the gross rent, taxable profit and whether you already complete Self Assessment.
Self Assessment is normally required
This threshold is tested after allowable expenses, subject to any other reason a tax return is required.
Report through a Self Assessment tax return
This threshold applies before expenses. A notice to file must still be answered even if the final profit is small or a loss arises.
Registration may be due by 5 October
If you are not already within Self Assessment, registration is usually required by 5 October following the end of the relevant tax year.
The work behind the return
What our landlord tax return service includes
The property pages are the end of the process. We first establish the rental business, reconcile the records and determine how each cost is treated.
Property and ownership review
We confirm each property, letting period, owner, beneficial share and whether UK and overseas property businesses must be kept separate.
Rental-income reconciliation
Rent, deposits retained, service receipts and agent statements are matched to bank and tenancy records rather than entered as one unsupported total.
Allowable-expense analysis
Repairs, insurance, management, utilities, legal costs and replacements are classified according to their purpose and supporting evidence.
Mortgage-interest calculation
Residential finance costs are recorded separately and the permitted tax reduction is calculated within the individual’s overall tax position.
Property pages and full tax calculation
The UK property result is combined with employment, pensions, dividends, gains and other relevant sources in the Self Assessment return.
Draft, approval and online filing
You receive the return, property calculation and payment position for approval before the final submission is made.
You receive the filed return, rental schedule, tax calculation and clear payment summary.
How the fee is scoped →From rent to taxable profit
How a landlord’s rental profit is calculated
All UK lettings held personally are normally treated as one UK property business. Income and expenses are recorded by property, then combined for the tax result; overseas property remains a separate business.
The calculation should preserve property-level detail. It is needed to explain unusual costs, allocate jointly owned property and retain capital expenditure for a later sale.
- StartGross rent and property receiptsIncluding amounts paid through an agent and relevant tenant charges.
- LessAllowable day-to-day expensesCosts incurred wholly and exclusively for the property business.
- AdjustRepairs, replacements and capital workEach category follows a different tax treatment.
- ApplyProperty losses or the property allowanceThe allowance is an alternative to actual expenses, not an extra deduction.
- ThenResidential finance-cost tax reductionCalculated separately for individual residential landlords.
- ResultProperty result within the complete tax returnOther income determines the rates, allowances and final payment.
Expense treatment follows the work
Allowable landlord expenses, repairs and improvements
A payment appearing on a property bank account does not make it deductible. We identify what was done, why it was necessary, what existed before and whether any private element is present.
Running the rental business
- Letting-agent and management fees
- Landlord insurance
- Service charges and ground rent
- Utilities and Council Tax paid by the landlord
- Advertising and qualifying professional fees
Repairs and replacements
- Work restoring the property rather than improving it
- Modern equivalent materials used in a repair
- Replacement domestic items for tenants
- Insurance or deposit recoveries
- Pre-letting work and the condition on purchase
Improvements and acquisition
- Extensions and new features
- Upgrades beyond a repair
- Initial furniture rather than replacements
- Property purchase and acquisition costs
- Private expenditure or mortgage capital repayment
Capital expenditure is not simply lost: records may be relevant to a future Capital Gains Tax calculation. See the official rental income and expense rules.
Individual residential landlords
20% is the current basic-rate used for the residential finance-cost tax reduction in 2026/27, subject to the detailed limit How residential finance-cost relief works ↗Mortgage interest is not the mortgage payment
Finance costs are handled separately for an individual residential landlord
Since 6 April 2020, mortgage interest and other residential finance costs are not deducted in full when an individual’s rental profit is calculated. Instead, a basic-rate tax reduction is considered after the property profit enters the wider Income Tax calculation.
The reduction can be limited by property profit, adjusted total income and the finance costs available. Unused restricted finance costs may be carried forward, so the schedule should agree with the previous return.
Company-owned property and some non-residential letting follow different rules. The capital repayment element of a mortgage is not a rental expense.
Different property records
Tax returns for buy-to-let, joint and non-resident landlords
One landlord can fall into several categories. The return is prepared as one tax position while each property retains its underlying records.
Single properties and growing portfolios
Rent, void periods, agent fees, repairs, insurance, finance costs and losses are reconciled across the UK property business.
HMO, student and room-by-room letting
Utilities, Council Tax, cleaning, furnishings and management may be paid by the landlord and require consistent property-level records.
Property owned with a spouse, partner or family member
Beneficial ownership and entitlement to income determine the reporting split. Spouses and civil partners living together are normally taxed equally unless the statutory alternative is properly supported.
UK property owners living outside the UK
The Non-resident Landlord Scheme, tax deducted from rent, residence pages and UK property pages need to agree with one another.
Short-term and former furnished holiday lets
The special furnished holiday letting regime ended for Income Tax from 6 April 2025. Current returns use the ordinary property rules, while transition points and earlier pools may still need review.
Property held through a limited company
Rental activity belongs in the company accounts and Corporation Tax return, not the director’s personal UK property pages.
The rules are moving
What landlords need to prepare for from 2026 to 2028
The annual return remains central, but digital record keeping and separate property-income rates change the work around it. Each date applies to a different group or tax year.
Current Making Tax Digital requirements ↗Furnished holiday letting regime ended
Individuals moved into the ordinary property-income rules for 2025/26 onward.
MTD started above £50,000
Applies where combined gross self-employment and property income for 2024/25 exceeded £50,000, unless exempt.
MTD threshold falls and property tax rates begin
MTD extends above £30,000 based on 2025/26 qualifying income. Separate property-income rates of 22%, 42% and 47% apply for 2027/28.
MTD threshold falls to above £20,000
The test uses combined gross property and self-employment income for 2026/27.
Already active for some landlords
Making Tax Digital for Income Tax is more than four figures sent each year
Landlords in scope must keep qualifying digital records, use compatible software, send quarterly updates and complete the year-end tax return process. The threshold is based on combined gross self-employment and property income before expenses—not rental profit.
Each property source still needs accurate categorisation. A quarterly total does not decide whether a payment is a repair, capital improvement, private cost or restricted finance cost.
Exemptions and special cases must be checked separately. Partnerships are not yet within this individual timetable.
Cardiff and South East Wales
The tax return should follow how the property is owned and operated
Cardiff landlords often hold a former home, student property, HMO or jointly owned buy-to-let alongside PAYE employment or a company. The records need to keep those positions distinct.
The first rental year needs a clear start date, opening property condition, mortgage use and separation between pre-letting capital work and ongoing repairs.
Room-by-room receipts, inclusive utilities, Council Tax, cleaning, furnishings and licence-related costs should be recorded consistently rather than reconstructed at the filing deadline.
Spouses and civil partners living together are normally assessed 50:50. An unequal split requires matching beneficial ownership and a valid declaration; other joint owners generally follow their actual entitlement.
Land Transaction Tax applies when Welsh property is acquired. The annual rental profit is a separate Income Tax calculation, and a later sale may require Capital Gains Tax reporting.
2025/26 landlord return
Self Assessment dates for rental income
The return covers rent and expenses from 6 April 2025 to 5 April 2026. Filing early confirms the amount due but does not normally bring the January payment date forward.
Check current Self Assessment deadlines ↗Register where a first return is required
Relevant when rental income first arose in 2025/26 and the landlord is not already registered.
Paper return deadline
Non-residents unable to use HMRC’s online filing service may use approved software instead of the earlier paper route.
Online return and balancing payment
The first payment on account for 2026/27 may also fall due.
Second payment on account
Applies where payments on account arise for the following tax year.
UK property while living abroad
Non-resident landlords still report UK rental income
For the Non-resident Landlord Scheme, a person is treated as living abroad when their usual place of abode is outside the UK—often where they are abroad for six months or more. This scheme test is not identical to statutory tax residence.
Official non-resident landlord rules ↗An approved NRL1 application can allow rent without scheme deductions, but it does not remove the annual UK tax liability or return.
Agent or tenant deductions are reconciled from the certificate and credited within the UK tax calculation.
The UK property and residence sections may be required. Commercial software or an agent is normally needed for online non-resident filing.
Disposal reporting is separate and can apply even where no Capital Gains Tax is ultimately payable.
Prepare the evidence once
Records needed for a landlord tax return
Send the full statements where possible. Net payments received from a letting agent usually exclude charges that must still be separated from gross rent.
Rent and tenancy
- Tenancy agreements
- Letting-agent annual statements
- Property bank statements
- Deposits or insurance receipts retained
Expenses and repairs
- Repair and maintenance invoices
- Insurance and service charges
- Utilities and Council Tax
- Management and professional fees
Mortgage and ownership
- Annual mortgage-interest statement
- Loan-purpose evidence
- Ownership or trust documents
- Form 17 and beneficial-interest evidence
Earlier tax records
- Previous returns and rental schedules
- Property losses carried forward
- Unused restricted finance costs
- HMRC letters and MTD notices
Property records generally need to be retained for at least five years after the 31 January filing deadline for the relevant return. Longer retention can be sensible for capital improvements and property ownership evidence.
From rental records to filing
How we prepare a landlord Self Assessment return
The same sequence works for one property or a portfolio; the record schedule expands with the number and complexity of the lettings.
- Step 01
Confirm properties and tax years
We establish ownership, letting dates, residence, filing status and any overdue work.
- Step 02
Reconcile rent and expenditure
Agent, bank, mortgage and invoice records are organised into a property schedule.
- Step 03
Calculate the property result
Expenses, losses, allowance and finance-cost relief are applied under the relevant rules.
- Step 04
Approve and file the return
You review the return, tax calculation and payment position before submission.
Rent was not declared
Bring earlier rental years up to date before HMRC finds the omission
An undeclared-rent review starts with the property timeline and annual records, not with a guessed disclosure figure. We calculate each year, identify returns already filed and determine the appropriate correction or disclosure route.
Explain the rental history →When the letting began
Ownership, first rent, private-use periods and years already reported set the disclosure scope.
Income and allowable costs by year
Bank, agent, mortgage and invoice records are used before estimates are considered.
Tax, interest and possible penalties
Earlier losses, tax deducted and finance-cost rules are matched to each year.
Use the correct HMRC route
The Let Property Campaign may apply to eligible residential letting, while other cases require a different approach.
A quote based on the records
What affects a landlord tax return fee?
The number of properties matters, but so do ownership, record quality, finance schedules and whether the work includes MTD, non-residence or earlier years. We agree scope before starting.
Read how our fees are agreed →A single managed property differs from several HMOs or mixed UK and overseas lettings.
Complete agent, bank and mortgage statements reduce reconciliation time.
Joint, trust, partnership and changing beneficial interests need additional review.
Multiple loans and carried-forward restricted costs require continuity schedules.
Residence pages, MTD records, several income sources or a property disposal add work.
Late returns and disclosures are quoted after the number of years and records are known.
Landlord tax questions
Questions landlords ask before filing
The answers below give the normal starting point. Ownership, property use, residence and the tax year can change the result.
Do I need a tax return for one rental property?
Possibly. Gross property income above £1,000 normally needs to be brought to HMRC’s attention. Self Assessment is normally required where gross rent exceeds £10,000 or taxable profit exceeds £2,500, and it may be required for other reasons or because HMRC has issued a notice to file.
Can I claim the full mortgage payment?
No. Mortgage capital repayment is not an expense. For an individual residential landlord, interest and related finance costs normally produce a basic-rate tax reduction rather than a full deduction from rental profit. Companies and commercial property can follow different rules.
Is replacing a boiler a repair or an improvement?
Replacing a failed boiler with a reasonable modern equivalent can normally be a repair. Work that materially upgrades, extends or changes the property may be capital. The condition before the work and the complete project must be considered rather than the invoice label alone.
How is jointly owned rental income divided?
Spouses and civil partners living together are normally taxed equally. Where they own and are entitled to income in unequal beneficial shares, a valid Form 17 declaration with evidence may allow that actual split. Other joint owners generally report their actual entitlement unless a different commercial allocation is agreed.
Can I use the £1,000 property allowance and claim expenses?
No. The property allowance is used instead of actual expenses for that income. A landlord with genuine running costs may obtain a better result from the expense calculation, while restrictions prevent the allowance being used in some connected-party and other situations.
What changed for furnished holiday lets?
The separate furnished holiday letting regime ended for Income Tax and Capital Gains Tax from 6 April 2025. For 2025/26 onward, short-term letting normally falls within the ordinary property rules, although earlier capital-allowance pools and transitional matters may still need attention.
Do overseas landlords still file a UK tax return?
Generally, yes. UK rental income remains taxable in the UK. Approval to receive rent without Non-resident Landlord Scheme deductions does not remove the reporting obligation; if tax was deducted, the certificate is reconciled within the return.
Does MTD replace my annual tax return?
No. Landlords within MTD keep digital records and send quarterly updates through compatible software, then complete the year-end tax return process and pay tax by the normal January deadline.
What happens when I sell the rental property?
The rental accounts end at the cessation or disposal date, but the gain is a separate calculation. A UK residential property disposal can require a Capital Gains Tax report and payment within 60 days of completion as well as year-end reporting.
One property or a portfolio
Start with the tax year, ownership and records available
We will identify the rental schedule, return pages and any MTD or earlier-year work required before providing a scoped quote.
. Thresholds and reporting rules are confirmed again for the return year and the landlord’s circumstances.