What does the tax code
1230L mean?
1230L means £270 off your allowance. If nothing about your employment has changed, the deduction often relates to income from elsewhere, and dividends are a common source.
Check if 1230L 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 guideNot every deduction in a tax code is about your job. PAYE is used as a general collection mechanism for income that arrives without tax already taken off, which means a code can be adjusted for things your employer has never heard of. Dividends are one of the most common.
On 1230L your tax-free pay for 2026/27 is £12,300, £270 below standard, and the difference costs about £54 a year.
- 1230L Tax Code
- An ordinary L-suffix code giving £12,300 of tax-free pay for 2026/27, £270 below the standard allowance. The L means normal allowance rules apply. A deduction of this size frequently relates to income from outside your employment, such as dividends, which HMRC collects through PAYE rather than billing separately.
How dividends reach a tax code
Company dividends are paid without tax deducted. If you hold shares directly, whether a handful from an employee share scheme or a portfolio built up over years, the company pays you the full amount and reports nothing to your payroll.
HMRC still wants the tax. For an employee, the least disruptive way to collect it is to reduce the tax code, so that slightly more of the wages you were already being taxed on becomes taxable. Nothing appears on your payslip labelled "dividends". The only trace is a smaller number in your code.
A dividend allowance applies first: a set amount of dividend income each year is taxed at nil. Only dividends above that allowance are chargeable, and they are taxed at their own rates, which differ from the rates on wages. Dividends held inside an ISA are outside all of this entirely and never produce a coding deduction.
The three things people get wrong about this
Assuming the deduction equals the tax. It does not. The deduction is the income being brought into charge, so £270 costs a basic rate taxpayer £54.
Assuming it means they must file a tax return. Not necessarily. Coding out exists precisely so that modest amounts of untaxed income can be settled through PAYE without a return. Larger amounts, or more complex affairs, do require one.
Assuming HMRC knows the real figure. It rarely does in advance. The deduction is a projection based on what was reported for an earlier year. Dividends are volatile in a way wages are not: a company can pay more, less, or nothing at all, and a holding can be sold entirely. A projection carried forward from two years ago describes a company's decision, not yours.
Worked example: 1230L on a £35,000 salary
- Gross salary: £35,000
- Subtract the 1230L allowance: £35,000 minus £12,300 = £22,700 of taxable income
- All within the basic rate band, taxed at 20%
- Income tax for the year: £4,540
- Monthly tax-free pay: £12,300 divided by 12 = £1,025
On the standard 1257L code the same salary produces £22,430 taxable and £4,486 of tax. The deduction therefore costs £54 across the year, or £4.50 a month. Income tax only, National Insurance excluded, and an estimate to confirm with HMRC.
An important footnote: National Insurance is not charged on dividends at all. Because the collection happens through a reduced code rather than through extra pay, your NI is unaffected, which is one of the few places where the mechanism produces exactly the right answer by accident.
Other income that gets coded out the same way
If dividends are not your explanation, the mechanism is identical for several other sources:
- Savings interest above your Personal Savings Allowance, covered on our 1255L page
- Rental profit from a property, where the amount is modest
- Taxable state benefits, which are paid without deduction
- Freelance or casual income that has not been dealt with through a return
The description on your coding notice distinguishes them, and it matters, because the right response differs. A dividend projection you can disprove should be corrected. A benefits deduction is usually right. A rental deduction may signal that HMRC expects a tax return from you, which is a bigger conversation than a coding query.
Dividends and the wider picture
One reason dividend coding causes disproportionate confusion is that dividends interact with the rest of your tax position in ways wages do not.
They sit on top of everything else. Dividend income is treated as the top slice of your income, so which rate applies depends on how much other income you have. The same £2,000 of dividends can be taxed at the ordinary rate for one person and the upper rate for another, purely because of their salary.
They can push you across a threshold. Because they stack on top, dividends can carry part of your income over £50,270 even though your salary alone is comfortably below it. That affects more than the dividends themselves: it halves your Personal Savings Allowance and can affect other entitlements.
They do not attract National Insurance. This is the well-known advantage of taking dividends rather than salary from your own company, and it is why the split between the two is a live question for company directors.
The dividend allowance is not a band. Dividends covered by the allowance are taxed at nil, but they still count as income when working out which band your other income falls into. It reduces the tax, not the income.
For most employees with a modest holding, none of this changes anything practical: a small deduction appears and life continues. It matters when the amounts grow, and it is the reason HMRC often moves people with significant investment income onto a T code rather than trying to settle the figure in advance.
When the deduction is wrong
You sold the shares. The most clear-cut case. No holding, no dividends, no deduction.
The company cut or suspended its dividend. A projection from a good year survives a bad one unless somebody says otherwise.
You moved the holding into an ISA. Dividends inside an ISA are not taxable and should not be coded.
It is being double counted. If you also file a Self Assessment return declaring the same dividends, check that the coding deduction is not collecting tax the return already settles.
It is a joint holding. Shares held jointly should have the income split, and both parties' codes should reflect only their share.
Correcting it
Sign in to your Personal Tax Account at gov.uk/personal-tax-account and open "Check your Income Tax". The breakdown shows the deduction, its description and its value in pounds. You can supply a revised expected figure there.
Bring specifics rather than an objection. Which holdings, what they actually paid last year, what you expect this year, and which are inside an ISA. A precise correction is acted on far more readily than a general statement that the figure looks too high.
If the position is more involved, 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 your record for review rather than settling on a number, which is common where investment income is significant.
Where a projection has been wrong across earlier years, those are settled separately within the four year window. Our guide to reclaiming overpaid tax covers how, and 2022/23 closes on 5 April 2027.
Our free tax code checker will estimate your correct code with and without the deduction. It gives an estimate rather than advice.
People also ask
- 1230L gives £12,300 of tax-free pay, £270 below the standard allowance
- A deduction like this often relates to income from outside your job rather than anything your employer does
- Dividends are paid without tax deducted, so HMRC collects the tax by shrinking your code
- The deduction is the income being taxed, not the tax, so £270 costs about £54 at the basic rate
- Dividends inside an ISA are never taxable and should not appear in a code
- These figures are projections from earlier years and age badly when a company changes its dividend
- National Insurance is unaffected, because dividends do not attract NI
Related tax codes: 1229L tax code | 1226L tax code | 1237L tax code | 1257L tax code | T tax code
Stop calculating manually.
TapTax connects to your bank, categorises expenses automatically, and submits quarterly updates to HMRC. Free plan, no card required.