Rental & Salary Sacrifice Scenario Calculator

This calculator models a plan to keep both partners' adjusted net income (ANI) below £100,000, protect eligibility for 30 funded childcare hours, and understand the after-tax cashflow from renting out a property through a managed letting agent.

It brings those moving parts together to estimate extra pension sacrifice needed, expected after-tax rental cashflow, and the break-even rent required for the plan to be sustainable.

UK simplification used (England/Wales/Northern Ireland): retention above £100,000 is treated as 38% in the £100,000–£125,140 band and 53% above £125,140. Planning model only, not formal tax advice.

Employment & childcare

Property

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Mortgage & tax assumptions

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Cashflow overview

Agent feeService chargeInsurance & legalRepairsMortgageRental tax

Monthly cashflow after tax

-£359

Annual cashflow after tax

-£4,305

Taxable rental profit

£19,085

Rental income & costs

Gross annual rent after voids

£25,608

Agent fee incl. VAT

£3,073

Annual service charge

£1,800

Insurance and legal (annual)

£450

Repairs reserve (annual)

£1,200

Mortgage

Computed monthly payment

£1,509

Annual mortgage payments

£18,108

Annual mortgage interest

£11,760

Annual principal repaid

£6,348

Tax

Person A taxable profit share

£9,543

Person B taxable profit share

£9,543

Person A inferred marginal rate

40%

Person B inferred marginal rate

40%

Person A rental tax

£2,641

Person B rental tax

£2,641

Total rental tax

£5,282

ANI & salary sacrifice

Person A — adjusted net income£96,543
Person B — adjusted net income£93,543

Person A ANI before extra sacrifice

£96,543

Person B ANI before extra sacrifice

£93,543

Person A extra sacrifice needed

£0

Person B extra sacrifice needed

£0

Childcare & break-even thresholds

Monthly rent vs break-even-£701shortfall

Childcare indifference ANI threshold

£152,398

Person A compensation threshold

£147,856

Person B compensation threshold

£146,856

Break-even monthly rent

£2,901

Saved calculations (local browser only)

No saved calculations yet.

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