What Is a Good Price-to-Rent Ratio When Buying?
The price-to-rent ratio is the home's price divided by one year's rent for a similar home. A common rule of thumb is that a ratio of about 15 or less leans towards buying, 16 to 20 is a grey zone, and above 20 leans towards renting. It is a quick filter, not a decision: you still need to compare the full monthly cost of owning with renting, at today's mortgage rates.
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This is general information, not financial advice. The 15 and 20 cut-offs are rules of thumb, not official limits, and local markets differ.
The formula
Price-to-rent ratio = property price / annual rent
Annual rent = monthly rent x 12.
The ratio is the flip side of gross yield. A ratio of 20 means a gross yield of 1 / 20 = 5%. A ratio of 25 means 4%.
Worked example (example numbers)
Home A: price £300,000, similar homes rent for £1,250 a month.
- Annual rent: 1,250 x 12 = £15,000
- Ratio: 300,000 / 15,000 = 20
- Gross yield: 5%
Home B: price £240,000, rent £1,300 a month.
- Annual rent: £15,600
- Ratio: 240,000 / 15,600 = 15.4
- Gross yield: 6.5%
Home B is cheaper to own relative to what it would cost to rent. On the rule of thumb, B leans towards buying and A sits at the top of the grey zone.
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Step two: the monthly cost test
The ratio ignores interest rates. Do a quick owner cost versus rent check for Home A (example numbers):
- Deposit 10%: £30,000. Mortgage £270,000 at an example 4.5% over 25 years: about £1,500 a month.
- Owner extras: maintenance at 1% of value a year = £250 a month, plus insurance and any service charge, say £50.
- Owner monthly cost: about £1,800.
- Rent: £1,250.
Part of the £1,500 mortgage payment is capital you keep. In the first years, interest is roughly £1,000 of it (4.5% x 270,000 / 12 = £1,012). So the "unrecoverable" cost of owning is about 1,012 + 300 = £1,312 a month, plus the lost return on your £30,000 deposit and buying costs. That is close to the £1,250 rent. Buying here is a bet on price growth and on staying long enough to spread the buying and selling costs.
How to use the ratio well
- Compare like with like. Same area, same size, same condition. A new-build flat and an old house do not compare.
- Use real rents. Use let-agreed rents, not hopeful asking rents.
- Look at the trend. A ratio that has risen fast means prices have outrun rents.
- Add your time horizon. Buying and selling costs are large. Under about five years, renting often wins even at a good ratio.
- Check across countries carefully. In some cities, rents are low compared with prices, so ratios run high for years. In parts of Dubai and the US, yields are higher, so ratios are lower. Compare within the same market.
Common mistakes
- Using asking prices and asking rents from different streets.
- Treating 15 or 20 as a law. They are starting points.
- Ignoring service charges, ground rent, HOA fees or society maintenance, which change the real cost of owning.
- Comparing ratios across countries with different tax and mortgage rules.
- Forgetting that renting keeps your deposit free to invest elsewhere.
The full rent-or-buy section, with a step-by-step calculator and the money maths behind it, is in Real Estate: Everything You Need to Know.
FAQ
Is a high price-to-rent ratio always bad?
Not always. It can reflect a market where people expect strong growth. But it means you rely more on growth than on rent to make money.
How is this different from rental yield?
They are the same information turned upside down. Gross yield = annual rent / price. Ratio = price / annual rent.
Should investors use this ratio?
As a first filter, yes. Then work out net yield and cash flow after all costs and financing.
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