Gross yield tells you about the property. Return on investment tells you about your money. They are not the same thing.
Imagine two investors who buy identical flats in the same Portsmouth block. Investor A puts down a 25% deposit. Investor B puts down 40%. The flats have the same rent, same costs, same gross yield. But Investor A’s ROI is significantly higher because they have less cash tied up in the deal.
ROI measures the annual cashflow you receive as a percentage of the total cash you invested. It answers the question: for every pound I put into this deal, how many pence do I get back each year?
The total cash invested includes your deposit, stamp duty, legal fees, survey costs, mortgage fees, and any refurbishment costs. It is everything you pay that you cannot borrow.
Let us use a real example. You buy a £200,000 flat with a £50,000 deposit. Your costs add up to £58,000. Your annual net cashflow after mortgage payments is £3,500. Your ROI is 6%.
That 6% is the number that matters. It tells you your cash is working better than it would in a savings account but worse than a well-performing index fund. The justification for accepting 6% in property is that you also get capital growth, tax advantages, and leverage that amplify your returns over time.
If your ROI is consistently below 4% across your portfolio, your cash is underperforming. Consider whether selling and reinvesting would give you a better return.
The formula
ROI (%) = (Annual Net Cashflow / Total Cash Invested) × 100
Why this matters
ROI tells you whether your cash is working hard enough. If your property returns 5% while your pension returns 7%, the property needs to justify itself through capital growth or portfolio diversification. Run this number annually on every property you own.
If you want to know exactly what a property is worth before you make an offer, Xelox Properties can help. We run the numbers so you do not have to.