Pay compression: causes, risks and practical solutions

Compression is not automatically wrong. Smaller pay differences may reflect deliberate choices about fairness or organisational culture. It becomes a problem when the pattern conflicts with job value, skills, contribution, career progression or the organisation’s reward principles.

What causes pay compression?

Compression rarely has one cause. Several factors often interact.

Statutory wage increases

Increases to statutory minimum rates can lift the bottom of a pay structure faster than the organisation’s overall salary budget. In the UK, the National Living Wage increased to £12.71 from April 2026, while the rate for workers aged 18 to 20 increased by 8.5% to £10.85. Organisations with substantial lower-paid populations may therefore experience pressure across several grades, not only in roles paid directly at the statutory minimum.

Targeted market adjustments

Recruitment pressure can lead managers to appoint new employees at higher salaries without reviewing existing employees. Repeated exceptions gradually reduce the value of experience and create inconsistent positioning within ranges.

Flat or poorly maintained structures

Salary ranges may remain unchanged while hiring rates, statutory pay and market practice move. Narrow grade differentials, overlapping ranges and unclear progression rules can all intensify compression.

Uneven pay-review decisions

Across-the-board percentage increases preserve existing relativities but may not address structural problems. Conversely, concentrating increases only on the lowest paid can create new compression higher in the structure unless the wider effect is modelled.

Promotion and career practices

Small promotional increases, inconsistent job evaluation or unclear career levels can result in employees taking on materially greater responsibility for little additional reward.

What risks does pay compression create?

The most visible risk is retention. Experienced employees may question why their pay is close to that of new starters, while supervisors may see insufficient financial recognition for additional accountability.

Compression can also reduce career motivation. If moving to a more demanding role produces only a small increase, employees may decide that progression is not worthwhile.

Other risks include higher recruitment cost, repeated counteroffers, employee-relations concerns, equal-pay exposure and loss of confidence in the fairness of reward decisions. The effect is often greatest where the organisation cannot explain why differences exist.

How to diagnose pay compression

Begin with role and employee-level data. Analyse actual pay, grade, job family, location, tenure, performance where relevant, hiring salary, promotion history and reporting relationships.

Useful measures include:

• the difference between grade minima and statutory wage rates;
• pay gaps between adjacent grades or career levels;
• the relationship between manager and direct-report pay;
• the position of new starters compared with experienced employees;
• range penetration and concentration around particular points;
• promotional increases and time since last progression; and
• unexplained differences within comparable work.

The analysis should distinguish structural compression from individual cases. It should also test internal equity and equal-pay implications rather than treating every difference as a market-pricing question.

Practical ways to respond

Rebuild the lower part of the pay structure

Where statutory increases have overtaken the design, review grade minima, reference points, maxima and differentials together. Simply lifting the minimum may move the problem to the next grade.

Prioritise targeted adjustments

Targeted budgets can address the most significant or highest-risk anomalies. Criteria should be transparent, evidence-based and consistently governed.

Strengthen starting-salary controls

Define who can approve exceptions and require consideration of internal comparators before an offer is made. Recruitment urgency should not create future inequity without visibility.

Clarify pay progression

Employees should understand how skills, sustained contribution, experience or market position influence movement within a range. Progression rules must match what the organisation can afford to deliver.

Review promotion policy

Test whether promotional increases create meaningful recognition of added responsibility. A percentage-only rule may be inadequate where an employee starts far below the appropriate position in the new range.

Use non-pay elements carefully

Recognition, development and benefits can strengthen the employee proposition, but they should not be used to avoid correcting material structural or fairness problems in base pay.

Modelling the options

Before making changes, model cost over more than one year. A solution that appears affordable in the current cycle may create recurring cost or further pressure when statutory rates increase again.

Scenario modelling should show employee impacts, grade differentials, protected groups, recruitment rates, future range movement and the interaction with overtime, allowances, pensions and other pay-linked costs.

Frequently asked questions

Is pay compression the same as pay inversion?

No. Compression means differences have narrowed. Pay inversion occurs when a role or employee that would normally be expected to receive more is paid less than the comparator group.

Can market benchmarking solve compression?

Market evidence helps, but compression is also an internal-structure and progression issue. External data should not replace analysis of job value and internal equity.

Should every grade have the same percentage differential?

Not necessarily. Appropriate differentials depend on job value, career steps, labour markets and organisational design. The important point is that differences are intentional and explainable.

Can pay compression create equal-pay risk?

It can contribute to unexplained differences, but a full equal-pay assessment requires analysis of comparable work and objective reasons for pay outcomes.

Review the structure, not just the symptom

Reward Associates supports pay and grading reviews, pay modelling, market benchmarking and progression design. We help organisations identify the source of compression, model affordable alternatives and implement clearer structures.

Book a free 30-minute Reward Consultation to discuss your pay-compression risks and the evidence needed for a focused diagnostic.

About the author

Jean-Baptiste Jugand is the founder of Reward Associates and advises organisations on salary structures, job evaluation, market benchmarking, pay progression and reward transformation.

References

• UK Government, National Minimum Wage and National Living Wage rates, April 2026.
• Low Pay Commission, The National Minimum Wage in 2026.