What does the tax code
1229L mean?
1229L means £280 has come off your allowance. Where a landlord has a job as well, small rental profits are frequently settled through the tax code instead of a return.
Check if 1229L is right for you
Free and instant, no sign-up. HMRC rates for 2026/27, or every year you can still claim.
Add your benefits, pension and Marriage Allowance for a sharper answer.
Get the detailed breakdown + free reclaim guideIf you let out a property and also have a job, there are two ways the tax on your rental profit can reach HMRC. One is a Self Assessment return. The other is a quiet reduction in your tax code, which most people do not connect to the property at all.
1229L gives £12,290 of tax-free pay for 2026/27, £280 below standard, and costs about £56 a year.
- 1229L Tax Code
- An ordinary L-suffix code giving £12,290 of tax-free pay for 2026/27, £280 below the standard allowance. The L means normal allowance rules apply. Deductions of this size are often untaxed income from outside your job, and for anyone letting a property, modest rental profit is a frequent explanation.
The property allowance comes first
Before any of this bites, there is an allowance. A set amount of property income each year, currently £1,000, is covered by the property allowance and is not taxed at all.
Two important features of it.
It applies to income, not profit. If your gross rents are within the allowance, you have nothing to report and nothing to pay, regardless of your costs.
You choose between the allowance and your actual expenses. You cannot claim both. For someone with £1,500 of rent and £200 of costs, claiming the allowance is better. For someone with £1,500 of rent and £900 of costs, deducting the real expenses is better.
Only what remains after that choice can produce a coding deduction. So a £280 deduction implies roughly £280 of taxable property profit, which is a very small letting or one where costs absorb most of the rent.
Why the deduction is not your rent
The figure in your code is taxable profit, not rental income. Getting this straight prevents most of the confusion here.
Rent received, less allowable expenses, gives your profit. Allowable costs for a residential let typically include letting agent fees, insurance, repairs and maintenance as distinct from improvements, ground rent and service charges, and council tax or utilities where you pay them. Mortgage interest is treated differently from other costs for residential property and is relieved in a restricted way rather than simply deducted, which is a rule change that still catches people out years later.
Whatever the profit comes to, the coding deduction equals that profit, and what you actually pay is the tax on it.
Worked example: 1229L on a £29,000 salary
- Gross salary: £29,000
- Subtract the 1229L allowance: £29,000 minus £12,290 = £16,710 of taxable income
- All within the basic rate band, taxed at 20%
- Income tax for the year: £3,342
- Monthly tax-free pay: £12,290 divided by 12 = £1,024.17
On the standard 1257L code the same salary produces £16,430 taxable and £3,286 of tax. The deduction costs £56 across the year, or £4.67 a month, which is 20% of the £280 profit. Income tax only, National Insurance excluded, and an estimate to confirm with HMRC.
Coding out versus a tax return
Coding out is a convenience for small amounts. It has limits, and knowing where they sit avoids an unpleasant surprise.
Small profits can usually be coded. HMRC would rather collect a modest sum through PAYE than process a return for it, and so would most taxpayers.
Larger profits generally require Self Assessment. Once property income passes the relevant reporting thresholds, a return is required regardless of how the tax is collected.
The two can overlap badly. If you file a return and a coding deduction is also running for the same income, check that the tax is not being collected twice. This is a real and reasonably common error, because the return settles the liability while the code has been collecting against it all year.
Coding out is not a substitute for reporting. If you were required to file, having the tax coded out does not remove that obligation.
If your letting has grown, the move from one regime to the other is worth planning rather than discovering.
Jointly owned property and the 50/50 rule
Property is very often held with somebody else, and the tax treatment of jointly held property has a default that surprises people.
Where a property is owned jointly by spouses or civil partners, the income is treated as split equally between them for tax purposes, regardless of the actual shares in which the property is owned. So a property owned 80/20 still produces a 50/50 split of the income unless the couple does something about it.
That default can be changed, but only in a specific way: the couple must actually own the property in unequal shares, and they must jointly notify HMRC that they want the income treated according to those real shares. The notification takes effect from the date it is made rather than retrospectively, so it cannot be used to rewrite a year that has already passed.
The reason this belongs on a page about a coding deduction is that both partners should see the consequences in their codes. If the income is split, each code should carry only that person's half. A deduction reflecting the whole rental profit in one partner's code, while the other carries nothing, is worth querying.
For unmarried joint owners the position is different again: the income follows the actual beneficial ownership rather than defaulting to an equal split.
Two further points worth knowing. Where one partner pays tax at a higher rate than the other, how the income is split materially changes the household tax bill. And where only one of you appears on HMRC's record as receiving the income, the other may be missing a liability rather than avoiding one.
When the deduction is wrong
You sold the property or the tenancy ended. No income, no deduction, but nothing removes it automatically.
The profit fell. A void period, a major repair, or a rent reduction changes the figure. The deduction is a projection carried forward from an earlier year and will not track any of that.
Costs were not taken into account. If the deduction looks like your rent rather than your profit, that is worth querying directly.
It is jointly owned. Property held jointly should have the income split between the owners, and each code should reflect only that person's share.
You have also declared it on a return. As above, check for double collection.
Sorting it out
Sign in to your Personal Tax Account at gov.uk/personal-tax-account and open "Check your Income Tax". The breakdown names each deduction and gives it in pounds, so you can confirm whether the figure is described as property income and whether it resembles your actual profit.
Come with numbers: rent received, allowable costs, and the resulting profit for the year in question. A specific revised figure is acted on; a general objection is not.
The Income Tax helpline is 0300 200 3300. Our guide to checking your tax code covers where each figure appears, and the T tax code page explains what happens when HMRC flags a record for review rather than settling on a number, which is common once property income becomes significant.
Where the figure has been wrong across earlier years, those are settled separately within the four year window, which our guide to reclaiming overpaid tax covers. 2022/23 closes on 5 April 2027.
Our free tax code checker will estimate what your code should be with and without the deduction. It gives an estimate rather than advice.
People also ask
- 1229L gives £12,290 of tax-free pay, £280 below the standard allowance, costing about £56 a year
- Modest rental profit is often collected through a tax code rather than a Self Assessment return
- The property allowance covers a set amount of property income, currently £1,000, and applies to income not profit
- You choose between the property allowance and deducting actual expenses, never both
- The coding deduction is your taxable profit, not your rent
- Mortgage interest on residential property is relieved in a restricted way rather than simply deducted
- If you also file a return declaring the same income, check the tax is not being collected twice
Related tax codes: 1230L tax code | 1226L tax code | 1236L tax code | 1257L tax code | T tax code
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