UK Income Protection vs Critical Illness Compared

Income protection and critical illness cover serve different risks. Income protection covers loss of earnings from inability to work; critical illness pays a lump sum on diagnosis of a defined condition. Most households with dependants benefit from both, but where budget is limited, the question is which to prioritise.

What each covers

Income protection covers loss of earnings: a defined percentage of pre-claim income (typically up to 60% to 65%) is paid monthly after the deferred period until the insured can return to work or until the benefit period ends. Critical illness pays a lump sum on diagnosis of a defined condition, regardless of whether the insured can continue working.

Frequency and duration

Income protection can pay out repeatedly if the insured suffers multiple periods of illness; the cover continues after recovery. Critical illness typically pays once on diagnosis (or in part for less severe forms) and the cover ends.

Deferred periods and waiting

Income protection has a deferred period before payments start (4, 13, 26, or 52 weeks). Longer deferred periods reduce premium. Critical illness typically pays out a defined period after diagnosis (often 14 days survival required) without a long deferred period.

Cost comparison

Income protection premiums are typically higher than critical illness for equivalent levels of protection, reflecting the wider range of conditions that can trigger a claim. CI is more focused on severe defined conditions.

Which to prioritise

Income protection is typically the first priority for working-age households because the risk of being unable to work for an extended period is statistically higher than the risk of a critical illness diagnosis. CI is a useful complement, particularly for households with debts that need to be cleared if a major illness strikes.

What each covers in detail

Income protection covers loss of earnings from inability to work. A defined percentage of pre-claim income (typically up to 60% to 65% of gross income) is paid monthly after the deferred period until the insured can return to work or until the benefit period ends.

The percentage limit (typically 60% to 65%) is set to prevent the insured being financially better off claiming than working. The figure is gross of tax; the actual cash received depends on the policyholder's tax position. For most claimants, the post-tax IP payment approximates their post-tax salary.

Critical illness pays a lump sum on diagnosis of a defined condition, regardless of whether the insured can continue working. The lump sum is paid once (or in part for less severe forms); the cover then typically ends. The payout is intended to clear major debts or provide for treatment costs.

The key difference is the trigger: IP triggers on inability to work (regardless of cause); CI triggers on specific diagnoses (regardless of work impact). Some causes (such as serious back injury) trigger IP but not CI; some diagnoses (such as cancer) trigger both potentially.

The financial structure is also different. IP provides regular income replacement; CI provides lump sum capital. The household's need for income vs capital determines which is more valuable.

Deferred periods in detail

Income protection has a deferred period before payments start. Common options are 4, 13, 26, or 52 weeks. Longer deferred periods reduce premium materially: a 26-week deferred period might cost half the premium of a 4-week deferred period for equivalent cover.

The deferred period should align with the household's ability to cover the gap. Employees with substantial sick pay from the employer (such as 6 months full pay then 6 months half pay) might choose a 26-week or 52-week deferred period because sick pay covers the early months. Employees with only Statutory Sick Pay (currently GBP 116.75 per week for up to 28 weeks) typically choose shorter deferred periods.

Self-employed individuals typically have no sick pay and may choose short deferred periods (4 or 8 weeks). Self-employed IP is somewhat different from employed IP because there is no employer sick pay to integrate with.

Critical illness typically pays out a defined period after diagnosis (often 14 days survival required) without a long deferred period. The payout is faster than IP for events that meet the CI definition.

Frequency and duration of payments

Income protection can pay out repeatedly if the insured suffers multiple periods of illness; the cover continues after recovery. The benefit period (until recovery, retirement, or a defined number of years) determines the maximum payment for any single claim.

The benefit period options typically include: short-term (1, 2, or 5 years) and long-term (until age 65 or 70). Short-term policies are cheaper but provide less protection for chronic conditions. Long-term policies provide protection through the working life but cost more.

Critical illness typically pays once on diagnosis (or in part for less severe forms) and the cover ends. There is no continuing income or further payouts after the lump sum. For multiple separate conditions, a single CI policy typically does not pay twice.

Some advanced policies allow multiple CI claims (such as one full payment plus subsequent partial payments for additional conditions). The structure is less common and typically costs more.

Cost comparison

Income protection premiums are typically higher than critical illness for equivalent levels of protection. The wider range of conditions that can trigger an IP claim and the long-term payout structure both contribute to the higher cost.

For a 35-year-old non-smoker, GBP 1,500 per month IP cover with 26-week deferred and benefit to age 65 might cost GBP 25 to GBP 50 per month. GBP 100,000 CI cover at the same age might cost GBP 30 to GBP 60 per month. The two are not directly comparable but illustrate similar price ranges for typical levels.

Occupational class affects IP premium materially. Office-based occupations (Class 1) attract the lowest premiums; manual occupations (Class 3 or 4) attract significantly higher premiums. Some specialist insurers focus on specific occupation types.

Smoker status, medical history, and family history affect both CI and IP premiums. The same applicant may receive different ratings for CI vs IP depending on the specific medical history; some conditions affect one more than the other.

Which to prioritise

Income protection is typically the first priority for working-age households because the risk of being unable to work for an extended period is statistically higher than the risk of a critical illness diagnosis. Most working adults have a higher probability of long-term sickness absence than serious illness diagnosis.

CI is a useful complement, particularly for households with debts that need to be cleared if a major illness strikes. The lump sum can clear the mortgage, allowing the household to focus on recovery without the mortgage burden.

Households with strong employer sick pay (such as 6 months full pay plus 6 months half pay) may have less immediate need for IP because the sick pay covers the early period. CI may be more valuable in this scenario because the lump sum supports recovery beyond the sick pay period.

For self-employed individuals or contractors without sick pay, IP is typically the higher priority because there is no fallback for sickness-related income loss.

For higher-rate taxpayers, the post-tax value of IP (which is typically paid tax-free) is high relative to taxable income. The combined IP plus CI structure provides comprehensive cover for most households.

Disclaimer

This article provides general information based on rules and figures published by UK government and regulator sources as of May 2026. It is not personal financial, legal, immigration or tax advice. Rules, fees and figures change and individual circumstances vary. Readers should check primary sources or consult a qualified, regulated adviser before acting on any information here.

Frequently asked questions

Does income protection pay if the cause is mental health?

Many policies cover mental health conditions causing inability to work, subject to medical evidence and the policy definition. Mental health claims have increased in recent years; the major insurers' claim statistics show mental health among the leading claim causes. Specific definitions and exclusions vary by insurer; reading the policy terms is essential.

Can income protection pay alongside Statutory Sick Pay?

Yes, but the deferred period is often set to start after SSP ends. The total replacement income (SSP plus IP) cannot exceed the agreed cover percentage. SSP is taxable; IP is typically tax-free; combining them produces a tax-efficient income replacement structure for the typical claimant.

What is 'own occupation' cover?

Own occupation pays out if the insured cannot do their own job, even if they could do another job. 'Any occupation' is stricter and typically only pays if the insured cannot do any reasonable work. 'Suited occupation' is intermediate, paying if the insured cannot do their own or a similar job. Own occupation is the most generous and typically the most expensive.

Are tax payments due on payouts?

Income protection payouts paid to an individual policyholder are typically tax-free. Critical illness lump sums are also typically tax-free. Employer-paid schemes may have different tax treatment (the employee may be treated as receiving the cover as a benefit-in-kind). For individual cover, the payouts are typically tax-free regardless of policy size.

Can both be cancelled if circumstances change?

Yes. Either can be cancelled at any time. Cancelling means losing the cover and the premiums paid. There is no surrender value on term-style cover. Before cancelling, considering whether equivalent cover can be obtained later at the same rate (typically not, because of age and medical changes) helps inform the decision.

Are IP and CI typically bought together?

Many households take both because they cover different risks. Some package products (such as 'menu plans') allow IP, CI, and life cover to be combined in a single policy structure with shared underwriting. The combined approach can be more efficient than separate policies but reduces flexibility to drop or change individual covers.

How does IP work for the self-employed?

Self-employed IP works similarly to employed IP but the income evidence is from self-assessment rather than payslips. The pre-claim income is typically calculated from the average of recent self-assessment income (often 2 or 3 years). The deferred period is typically shorter because there is no employer sick pay; the benefit is more critical because there is no fallback.

Frequently asked questions

Does income protection pay if the cause is mental health?

Many policies cover mental health conditions causing inability to work, subject to medical evidence and the policy definition. Mental health claims have increased in recent years; the major insurers' claim statistics show mental health among the leading claim causes. Specific definitions and exclusions vary by insurer; reading the policy terms is essential.

Can income protection pay alongside Statutory Sick Pay?

Yes, but the deferred period is often set to start after SSP ends. The total replacement income (SSP plus IP) cannot exceed the agreed cover percentage. SSP is taxable; IP is typically tax-free; combining them produces a tax-efficient income replacement structure for the typical claimant.

What is 'own occupation' cover?

Own occupation pays out if the insured cannot do their own job, even if they could do another job. 'Any occupation' is stricter and typically only pays if the insured cannot do any reasonable work. 'Suited occupation' is intermediate, paying if the insured cannot do their own or a similar job. Own occupation is the most generous and typically the most expensive.

Are tax payments due on payouts?

Income protection payouts paid to an individual policyholder are typically tax-free. Critical illness lump sums are also typically tax-free. Employer-paid schemes may have different tax treatment (the employee may be treated as receiving the cover as a benefit-in-kind). For individual cover, the payouts are typically tax-free regardless of policy size.

Can both be cancelled if circumstances change?

Yes. Either can be cancelled at any time. Cancelling means losing the cover and the premiums paid. There is no surrender value on term-style cover. Before cancelling, considering whether equivalent cover can be obtained later at the same rate (typically not, because of age and medical changes) helps inform the decision.

Are IP and CI typically bought together?

Many households take both because they cover different risks. Some package products (such as 'menu plans') allow IP, CI, and life cover to be combined in a single policy structure with shared underwriting. The combined approach can be more efficient than separate policies but reduces flexibility to drop or change individual covers.

How does IP work for the self-employed?

Self-employed IP works similarly to employed IP but the income evidence is from self-assessment rather than payslips. The pre-claim income is typically calculated from the average of recent self-assessment income (often 2 or 3 years). The deferred period is typically shorter because there is no employer sick pay; the benefit is more critical because there is no fallback.