Key Person Income Protection: When You Need It and How It Works (UK 2026)

Key person income protection is the income-replacement cousin of keyman insurance. Instead of a lump sum on death or critical illness, it pays the business a monthly income for as long as a named key person is signed off work because of illness or injury — up to a chosen benefit period (often 2 years, 5 years or to age 65). It is the right answer when the risk you are insuring against is “the key person is alive but cannot work for many months”.

Quick facts

• Pays a monthly income to the business, not a lump sum
• Trigger: key person unable to perform their occupation due to illness or injury
• Deferred period: how long the company self-insures before the policy pays
• Benefit period: maximum length of payment (2 years, 5 years, or to retirement)
• Premium calculation: similar drivers to lump-sum keyman + occupation rating
• Tax treatment: similar Anderson-principle analysis as for lump-sum keyman cover

How key person income protection differs from lump-sum keyman cover

What income amount can I cover?

Most UK insurers cap key person income protection at around 60–65% of the key person’s relevant business income contribution. The cover replaces lost trading capacity, not full revenue.

Deferred periods explained

The “deferred period” is how long the company waits before the policy starts paying:

• 4 weeks: shortest, highest premium — appropriate for very small SMEs with no buffer.
• 13 weeks: common SME default — balances cost and self-insurance burden.
• 26 or 52 weeks: longer wait, lower premium — appropriate where the company has cash reserves to ride out 6–12 months.

Benefit periods explained

• 2 years per claim: cheapest, covers most short-to-medium claims.
• 5 years per claim: middle ground.
• To retirement age: most expensive, covers permanent incapacity.

When is key person income protection the right product?

• The key person’s day-to-day presence is what generates revenue (consultant, billing partner, hands-on technical lead).
• Long-term illness, not death, is the bigger risk you want to insure.
• You already have separate lump-sum life cover via keyman insurance.
• You are committed to replacing the key person’s income contribution while they are off, not replacing them entirely.

When is it the wrong product?

• You need a one-off injection to clear debt or fund a replacement hire — that is a lump-sum keyman job.
• The key person is shareholder-only, not active in the business — income protection is not appropriate.
• The role can continue at reduced capacity from home — the income loss is too small to justify the premium.

Cost expectations

Indicative monthly premiums for £5,000/month of cover, 13-week deferred, 5-year benefit period, healthy non-smoker, standard occupation:

• Age 30: ~£40–£70
• Age 40: ~£60–£110
• Age 50: ~£110–£190

Higher-risk occupations (manual trades, hazardous environments) attract loadings of 25–75%.

How to apply

Use the same whole-of-market quote form as for lump-sum cover — the broker will quote both lump-sum and income-protection structures so you can pick the right combination. Many SMEs end up with both: a level-term keyman policy (death/CI) plus an income protection policy (long-term illness).

Related guides

• Key person protection vs keyman insurance
• Key person protection for limited companies
• What is keyman insurance?
• Keyman insurance and corporation tax

Frequently asked questions

What is key person income protection?

Cover that pays the business a monthly income if a key person is unable to work due to illness or injury, for the chosen benefit period.

How is it different from lump-sum keyman insurance?

Lump-sum cover pays a single payment on death or critical illness; income protection pays a monthly amount during long-term incapacity.

What does “deferred period” mean?

The waiting time after the key person stops work before the policy begins paying — the company self-insures during this period.

How much income can I cover?

Typically up to 60–65% of the key person’s relevant business income contribution.

Is it tax-deductible?

Premiums and payouts are analysed under the same HMRC Anderson principles as lump-sum keyman cover. See Keyman insurance and corporation tax.

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