PayslipIQ vs MoneySavingExpert tax-code checker

Last updated: 5 May 2026

TL;DR

MoneySavingExpert publishes a popular tax-code checker that helps readers spot likely-wrong codes and explains what the letters mean. PayslipIQ extends the same idea to the whole payslip - code plus PAYE, NI, pension and student-loan deductions - with anomaly detection and a plain-English commentary.

In one sentence

MSE is a strong starting point for tax-code questions; PayslipIQ is built to check the rest of the payslip alongside the code.

What is the MoneySavingExpert tax-code checker?

MoneySavingExpert (MSE) is a UK consumer-finance publisher with an established tax-code guide and an associated checker - see moneysavingexpert.com/family/tax-code-calculator. The page explains what the most common codes mean (1257L, BR, 0T, K, S and so on) and helps a reader sanity-check whether the letter on their payslip is plausible for their circumstances. It cites HMRC sources and is generally regarded as a reliable consumer explainer.

The scope is intentionally narrow: it focuses on the code itself rather than checking every line of a payslip. That makes it quick and approachable for the most common question - "is my code right?".

What is PayslipIQ?

PayslipIQ takes the idea further. We start with the payslip - typically uploaded as a photo or PDF - and run the deductions through HMRC's 2026/27 thresholds line by line. The tax code is one signal among several. We also check the PAYE total, the National Insurance bands (8% / 2%), the pension method (salary sacrifice, net pay, relief at source), the student-loan plan, and any non-cumulative marker. Where a number looks off, we say so in plain English and tag the severity.

We publish a methodology page that lists every formula and links each one back to the matching HMRC source. The same page also documents the limits - for example, OCR quality on photo uploads - so readers know what we cannot see.

Side-by-side comparison

Feature	MSE tax-code checker	PayslipIQ
Primary scope	Tax-code sanity check + explainer	Full payslip check (code + PAYE + NI + pension + SL)
Reads an existing payslip	No (typed inputs)	Yes (image / PDF upload or manual)
Severity-tagged anomalies	Not in scope	Yes
Pension method handling	Limited	Salary sacrifice, net pay, relief at source explained
Student-loan plans	Brief mention	Plan 1/2/4/5 and PGL handled
Scotland (S prefix)	Yes	Yes - six bands modelled
Welsh (C prefix)	Yes	Yes
Plain-English explanation	Strong as an explainer	Tied to the specific anomalies on your payslip
Cost	Free	Free for one check; Pro for unlimited
Account required	No	No for the free check
Authority for the underlying numbers	Defers to HMRC	Defers to HMRC

Want to see whether the rest of your payslip - not just the code - looks right? Run a free check.

When to use which

Use MSE when you only want to interrogate the tax code itself. The MSE article is a friendly, well-written explainer and the checker is a fast way to confirm that, for example, BR on a second job is consistent with your situation. It is also a natural place to land if you arrived via a Google search for "is my tax code wrong?".

Use PayslipIQ when you want the same level of code commentary plus the rest of the payslip checked. We will explain the code with the same detail as MSE - see our tax-codes-explained guide and the per-code pages such as /tax-codes/BR - but we also tell you whether the PAYE total, NI, pension and student loan on the payslip look correct.

Pros and cons

MSE tax-code checker

Pros: well-established brand, friendly explainer copy, broad reach, free, ad-supported, cites HMRC sources. A good first stop for code-only questions.

Cons (relative to a payslip checker): does not read an actual payslip; does not check the deductions calculated under the code; does not flag anomalies in PAYE, NI, pension or student-loan figures. These are scope choices.

PayslipIQ

Pros: upload-based, full-payslip check, severity-tagged anomalies, per-code library, separate Irish PAYE/USC/PRSI build, published methodology and source list.

Cons: the free tier limits monthly checks; OCR depends on photo quality; we are not the authoritative source for HMRC rules - we link to gov.uk for those.

Accuracy and methodology

Both tools defer to HMRC's published thresholds and tax-code definitions. On 2 May 2026 we cross-checked the MSE tax-code explainer copy and the PayslipIQ tax-code library for several common codes (1257L, BR, 0T, K, S1257L) and found the explanations consistent with HMRC guidance. The differences are about depth and surface - MSE focuses on the code, we extend the check to the whole payslip - not about disagreement on what the codes mean. Results may vary as MSE updates its content and as HMRC issues new guidance.

Frequently asked questions

Is the MSE tax-code checker reliable?

MoneySavingExpert is a well-established UK consumer-finance publisher. Its tax-code checker is a well-known resource for spotting common code issues, and its accompanying article cites HMRC sources.

Why would I use PayslipIQ instead?

PayslipIQ goes beyond the tax code itself: we read an entire payslip and check the PAYE deduction, NI, pension method and student-loan plan, with severity-tagged anomalies and plain-English explanations.

Can I use both?

Yes - they overlap politely. MSE is a strong starting point if you only want to scrutinise the tax code; PayslipIQ is the right place to check the whole payslip.

Do either of these replace HMRC?

Neither tool replaces HMRC. The authoritative answers about your code, allowances and reconciliation come from your HMRC Personal Tax Account and the P2 coding notice.

We are not affiliated with MoneySavingExpert. We checked the MSE tax-code page on 2 May 2026; results may vary as MSE updates content. Educational content, not regulated tax advice.

Code-only check done? Run the rest of the payslip through PayslipIQ.

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