Salary Comparison Calculator UK 2026/27

Comparing two UK job offers by headline salary can produce the wrong answer. A higher salary may come with a longer commute, lower employer pension contribution, a weaker bonus, different student-loan deductions or a larger childcare and rent bill. A lower salary may offer stronger pension matching, more annual leave, flexible working or a shorter journey.

Use the UK Salary Comparison Calculator→ to model two offers side by side. It can compare gross salary, estimated net pay, pension contributions, student-loan assumptions and a monthly cost adjustment. This is a calculator workflow, not a replacement for the Total Compensation UK guide, which covers bonus, equity and benefits in more depth.

Key takeaways

What the salary comparison calculator measures

The calculator is designed for a controlled comparison between Offer A and Offer B. Depending on the inputs, it can show:

• annual and monthly gross salary;
• modelled Income Tax and employee National Insurance;
• employee pension deductions and employer pension contributions;
• an indicative student-loan deduction for the selected plan;
• modelled monthly net pay; and
• a user-entered monthly adjustment for costs such as commuting, rent or childcare.

The result is most useful when the two scenarios share the same assumptions. If Offer A includes a 5% pension contribution and Offer B includes no pension, the output is not a pure salary comparison. That may be exactly the decision you need, but label the difference correctly: one offer is producing more cash and the other is directing more value into retirement saving.

The calculator does not independently value a defined-benefit pension, predict a bonus, price an equity award, decide whether a benefit is taxable, or confirm the tax treatment of an employer’s arrangement. Use the written offer and scheme documents for those lines.

Step 1: collect the two written offers

Create a comparison sheet before entering numbers. For each job, record:

Do not enter a recruiter’s “total package” figure as salary. Employer pension, target bonus and share awards have different certainty and liquidity. Put them into separate scenarios so the headline net-pay difference remains understandable.

Step 2: set the tax context once

Select the 2026/27 tax year and the relevant UK nation. GOV.UK publishes Income Tax rates and allowances for the year from 6 April 2026 to 5 April 2027. Scotland has separate Income Tax rates and bands; England, Wales and Northern Ireland use the relevant UK framework. The calculator’s region setting is therefore material even where the two offers have identical gross pay.

Use the same tax code assumption for both offers unless the jobs genuinely create different coding circumstances. A tax code is not a permanent percentage: it can reflect Personal Allowance, benefits, other income, multiple jobs or underpaid tax. If one offer is a second employment rather than a replacement job, model that separately and check the code with HMRC.

The calculator is an annual model. Actual payroll can differ because monthly pay, cumulative tax codes, bonuses, pension processing and rounding occur on particular payment dates. Compare the annual result first, then use the monthly view for household cash flow.

Step 3: enter gross salary and compare the baseline

Enter each offer’s base salary without adding bonus, equity or employer pension. This creates a clean baseline. If Offer A pays £60,000 and Offer B pays £66,000, the first output answers: “What is the modelled cash difference from base salary under the same assumptions?”

Do not immediately increase the higher salary by an expected bonus. A base-salary baseline lets you see which part of the outcome is contractual and which part depends on performance or service. If the job has a guaranteed first-year payment, add it as a separate scenario and note any clawback condition.

Look at the marginal difference, not only the total tax. If a pay rise crosses a tax band or changes adjusted net income, the additional gross amount will not all become take-home pay. Student-loan repayments and pension contributions can also change the cash result. The effective percentage shown by the calculator describes that scenario; it is not a universal UK tax rate.

Step 4: enter pension contributions accurately

Pension inputs need at least three distinctions:

1. employee contribution percentage or amount;
2. employer contribution percentage or amount; and
3. contribution method: salary sacrifice, net pay or relief at source.

GOV.UK explains that workplace pension contributions and tax relief depend on how the scheme is arranged. Salary sacrifice can reduce contractual pay for payroll purposes, while a net-pay arrangement deducts a contribution before Income Tax and a relief-at-source arrangement normally receives basic-rate relief through the provider. The same displayed percentage can therefore produce a different take-home result across schemes.

Do not compare Offer A’s 10% employer contribution with Offer B’s 10% employee contribution as if they were equal. One is additional employer value; the other may be a reduction in cash pay that builds the employee’s pension. Show both lines separately.

If one employer matches contributions above the default rate, model the minimum contribution and the full-match contribution as two scenarios. Check waiting periods, qualifying earnings, pensionable pay, contribution caps and investment charges in the scheme documents.

Step 5: select the student-loan plan

Student-loan deductions are driven by the plan and relevant repayment rules, not by the label “student loan” alone. Select the plan shown in the borrower’s records or payroll information. If the plan is unknown, run more than one scenario and treat the result as unresolved rather than choosing the most favourable one.

The deduction can make a higher salary produce a smaller-than-expected increase in monthly cash. That does not mean the offer is poor; it means the comparison needs to show the gross salary, student-loan repayment and net pay separately. The loan deduction may also stop or change when employment ends, income falls or the relevant threshold is not exceeded.

GOV.UK’s student-loan guidance takes priority over a calculator’s annual illustration. Check the payslip line, plan notice and payroll record. Do not use the calculator to decide whether a repayment plan has been recorded correctly.

Step 6: add real monthly costs

A salary comparison becomes more useful when it includes recurring costs that differ between offers. Add only the difference between the scenarios, not the entire household budget. Examples include:

• additional train, bus, parking or fuel costs;
• extra lunches or work clothing;
• rent or mortgage changes after relocation;
• childcare or after-school care caused by different hours;
• temporary accommodation or relocation costs; and
• recurring professional or equipment costs not reimbursed by the employer.

Do not describe these as tax deductions. They are household cash-flow adjustments entered by the user. A £300 monthly cost difference is £3,600 a year before considering any tax effect, but the calculator cannot put a monetary value on commuting time, stress, flexibility or family disruption.

Run three cost scenarios: zero adjustment, realistic adjustment and a higher-cost case. A job that wins only when the commute is assumed to be free should be labelled as sensitive to travel costs.

Step 7: compare package value separately from cash

Use the salary calculator for the cash layer, then add package lines in a second table:

This prevents a common error: adding employer pension, target bonus and equity to net pay and calling the result disposable income. It also makes trade-offs visible. A lower-cash offer may have a valuable pension match, while a higher-cash offer may be better for a short-term deposit or childcare objective.

Step 8: run sensitivity scenarios

Useful sensitivity cases include:

Common mistakes

Treating gross salary as disposable income

Income Tax, National Insurance, pension, student loans and other deductions mean the gross difference is not the cash difference. Use the same assumptions in both scenarios.

Counting employer pension as take-home pay

An employer contribution can be valuable without being available for rent, bills or a deposit. Display it separately.

Using a target bonus as guaranteed

Run a zero-bonus case and read the payment and leaver conditions. A target is not the same as contractual salary.

Applying one UK tax model everywhere

Scottish Income Tax differs from the rest of the UK. Tax codes, benefits and multiple jobs can also change the actual payroll result.

Hiding costs in the salary figure

Enter commute, rent and childcare adjustments in a visible cost line. Do not inflate or reduce salary to make the result look cleaner.

Comparing different tax years

A 2025/26 offer calculation and a 2026/27 offer calculation are not a fair comparison unless the tax-year change is intentional and labelled.

Frequently asked questions

Official sources

These official sources support the tax-year, pension, student-loan, benefits and regional tax explanations in this guide. Check the offer documents and current GOV.UK guidance before accepting a role:

• GOV.UK — Income Tax rates and allowances
• GOV.UK — Rates and thresholds for employers 2026 to 2027
• GOV.UK — Workplace pension contributions
• GOV.UK — Pension tax relief
• GOV.UK — Student loan repayment plans
• GOV.UK — Scottish Income Tax
• GOV.UK — Tax on company benefits

Start with the UK Salary Comparison Calculator→, then compare Total Compensation UK, Salary Sacrifice Calculator→, Pension versus ISA and Student Loan versus Investing.