Originally posted by moorfield
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Pay out £4800 from the company, then you receive £3600 cash.
If your offset rate is 6%, then that's £216 interest/year. Grossed up, that's £288 of cash received from the company required to pay that interest, before payment of 25% tax.
So if you start with an I/O mortgage of £103,600 then after 10 years:
Option ISA: £3,600 in ISA @ 6% AER = £6,447. Mortgage balance = £103,600. Pay down £3,600 on mortgage in year 10, leaves you with £100k mortgage balance, remaining ISA = £2,847
Option Year 1 Repay: Zero in ISA. Mortgage balance = £100,000. Additional retained profit in company = £288 * £10 = £2,880. Pay out as dividend: 25% = £2,160.
So option ISA leaves you with £2,847 TAX-SHELTERED capital. Option mortgage repay leaves you with £2,160 of taxable capital. You are MASSIVELY better off with option ISA.
Don't forget, that for us contractors, offset mortgages are not nearly as good as for salaried people - we can only paying 25% tax, normal people can avoid 40%.
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