Tax Code 1257M Explained
Standard allowance plus Marriage Allowance received
What does 1257M mean?
The M suffix confirms you are receiving the Marriage Allowance from your partner. Your effective allowance is £13,830 (£12,570 + £1,260). This is equivalent to code 1383L.
Annual tax-free allowance
£13,830
Example
A basic-rate taxpayer receiving Marriage Allowance from their partner.
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Other common tax codes
Standard personal allowance of £12,570
1257L W1Standard allowance on non-cumulative (week 1) basis
1257L M1Standard allowance on non-cumulative (month 1) basis
BRAll income taxed at 20% basic rate
D0All income taxed at 40% higher rate
D1All income taxed at 45% additional rate
NTNo tax deducted from this income
0TNo personal allowance: all income is taxed
0T W1Zero allowance on non-cumulative basis
S1257LScottish taxpayer with standard allowance of £12,570
SBRScottish basic rate (20%) on all income
SD0Scottish intermediate rate (21%) on all income
SD1Scottish higher rate (42%) on all income
SD2Scottish top rate (48%) on all income
C1257LWelsh taxpayer with standard allowance of £12,570
CBRWelsh basic rate (20%) on all income
CD0Welsh higher rate (40%) on all income
CD1Welsh additional rate (45%) on all income
KYou owe tax on benefits exceeding your allowance
1185LReduced personal allowance of £11,850
1100LReduced personal allowance of £11,000
1383LIncreased allowance of £13,830 (Marriage Allowance recipient)
1257NReduced allowance: you have transferred Marriage Allowance
1257TStandard allowance but items require HMRC review
1257LXEmergency code: standard allowance, non-cumulative
K100£1,000 added to taxable income
K475£4,750 added to taxable income
K800£8,000 added to taxable income