Rental Properties for Passive Income: What I'd Do Differently Now

The short version: Rental properties can generate income, but the "passive" bit is a lie; you'll spend time on tenants, maintenance, and taxes. Run the numbers on yield (rental income divided by property cost) before you buy anything, and factor in void periods, repairs, and agent fees that eat 8-12% annually.

Why I'd be cautious about buy-to-let right now

I'm 53, I've watched the buy-to-let market for twenty years, and I'll be plain: it's not the wealth-building engine it once was. I'm not saying don't do it. I'm saying go in with open eyes.

Here's the reality. A rental property in a decent UK market (say, Manchester or Birmingham) costs around 200,000 to 250,000. Mortgage rates in 2026 sit between 4.5% and 5.5%. Your rental yield on that property is probably 4-5% gross (that means rent divided by purchase price). After you've paid:

• Mortgage interest (not capital repayment, that's your equity gain)
• Council tax and business rates
• Buildings insurance
• Letting agent fees (typically 8-12% of rent)
• Void periods (empty months between tenants)
• Repairs and maintenance (budget 1% of property value per year minimum)
• Boiler replacement, roof work, electrics
• Tax on your profit

Your net yield drops to 0.5-2%. That's not passive income. That's a second job that pays you minimum wage.

What the spreadsheet taught me

I ran the numbers for a 230,000 property yielding 5% gross (11,500 a year rent). Here's what came out:

• Gross rent: 11,500
• Mortgage interest (assuming 80% loan, 5% rate): minus 9,200
• Letting agent (10%): minus 1,150
• Insurance: minus 400
• Council tax / rates: minus 800
• Maintenance fund (1%): minus 2,300
• Void allowance (one month empty per year): minus 960
• Tax on net (basic rate): minus 1,090
• Net income: minus 4,400

You're paying 4,400 a year to own that property. Your profit comes from the mortgage being paid down (equity gain) and, fingers crossed, house price growth. That's not income. That's a long-term investment masquerading as cash flow.

The maths only work if you believe property prices will rise faster than inflation, or if you're buying with cash and can rent it out yield-neutral because you don't need the income now.

When buy-to-let makes sense

I'm not saying no one should buy rental property. Here's when I'd do it:

You have cash and a long time horizon. If you've got 100,000 sitting in savings earning 4% (4,000 a year), and you can buy a property outright, rent it out, and accept 2% net yield (2,000 a year), you've lost 2,000 in annual income. But if the property appreciates 3-4% a year, you're ahead after five years. That's a ten-year bet, not a source of passive income this year.

You're doing this in a high-growth area. A property in inner London or a University city where rents are climbing and supply is tight is different from a property in a declining market. I'd only buy in places where migration, jobs, or education are driving demand. That's London, university towns (Cambridge, Oxford, Edinburgh), or tech hubs (Bristol, Manchester's city centre). Not scattered anywhere.

You can manage it yourself or have very low overheads. If you do the viewings, handle tenant relations, and fix small things yourself, you cut your costs dramatically. But you also get the second job I mentioned. Lettings agents charge 8-12% because they earn it: they deal with bad tenants, empty periods, and complaints at 11 p.m.

You're buying below market value. If you get a property 15-20% below market (through an estate agent with a distressed sale, a probate situation, or a property in poor condition you can renovate), the maths change. Suddenly you've got equity from day one and the yield looks better.

The things no one talks about

I've seen rental property wreck people's finances because they didn't plan for:

A six-week void. A tenant leaves. You need to redecorate, the next tenant falls through, you advertise for three weeks. That's 1,400 in rent you don't get. Budget for 4-6 weeks empty per cycle.

A boiler that dies in January. 2,500. A roof that leaks. 4,000. Subsidence survey. 800. These aren't "what if" scenarios; they're "when" scenarios. I've never owned a property that didn't surprise me with a bill between 1,000 and 5,000 in year two or three.

Mortgage changes. Your two-year fix ends. Rates have moved. Your new rate is 1% higher. Your mortgage just went from 550 to 700 a month. That's 1,800 a year gone from your profit. This happened to thousands of buy-to-let owners in 2022-2024.

Tax surprises. Mortgage interest relief is capped. You might have a 5,000 profit but owe 1,500 in tax. You need to set aside cash because rental income doesn't come with tax already deducted like a job does.

Problem tenants. Most tenants are fine. Some aren't. Eviction takes months. You get legal bills. Damage to the property. Rent arrears. I know two people who spent 8,000 each getting a bad tenant out. That's five years of net profit, gone.

Better ways to get passive income on less effort

If you want your money working without you managing tenants, consider:

Dividend stocks and ETFs. Buy an index fund yielding 3-4%. No tenants. No boilers. No void periods. No agent fees. Your money grows tax-free in an ISA. Yes, the stock market swings. But it doesn't text you at midnight.

Peer-to-peer lending. Some platforms offer 5-7% secured lending to property developers or small businesses. Your money is at risk, but you don't manage the properties.

Commercial property. Offices, retail, warehouses. Industrial units near motorways in the Midlands yield 5-7% and tenants are usually businesses on five-year leases, not individuals. Less drama. Higher yield. Still not passive.

Build income from your skills. This is what I've focused on the last five years. Courses, consulting, content that I create once and sell a thousand times. A course I built in 2024 generates 1,500-3,000 a month now, with zero maintenance costs and no tenants. That's passive.

If you're still buying: my checklist

• Run the exact numbers above. Don't estimate. Get three quotes from lettings agents. Call the council for the exact rates. Check insurance. Know your net income before you commit.
• Buy below market value or in a high-growth area, not both.
• Have six months of costs in reserve before you buy. Voids and repairs will drain cash fast.
• Use a mortgage broker, not a bank. They find better rates. At 5% vs. 4.75%, that's 575 a year saved on a 200,000 loan.
• Get a full structural survey, not the lender's basic valuation. It costs 800 but saves you 4,000 in surprises.
• Talk to existing landlords in that area. Not estate agents. Landlords. They'll tell you the truth about tenants, voids, and local repairs costs.
• Check the local market. Is the neighbourhood growing or shrinking? Are rents rising or flat? Is there student housing, corporate lets, or family rentals? These matter for filling your property fast.

The truth I'd tell a friend

Rental property is not passive income. It's a long-term property investment that also throws off some income. If you're buying because you think it'll pay your bills this year, you'll be disappointed and angry. If you're buying because you want to own assets, you can tolerate complexity, and you believe in the area, then it's worth considering. But run the spreadsheet first. Half the people I know who bought property in 2016-2020 thought they'd be retired on rental income by now. Most are still working, still paying into the mortgages, and still annoyed when the tenants' washing machine breaks.

Don't let FOMO or an estate agent's smile push you in. The maths have to work. On today's rates and prices, for most people, they don't.

Frequently asked questions

Is rental income really passive if I hire a lettings agent?

Mostly, yes. You won't handle day-to-day tenant issues or repairs. But you're still responsible for: monitoring finances, paying taxes, reviewing your strategy annually, dealing with major decisions (repairs, rent rises, evictions), and handling voids. It's semi-passive, and it costs you 8-12% of rent.

What's a good rental yield in 2026?

Gross yield of 5-6% is acceptable in competitive markets. Net yield (after all costs) of 1-3% is realistic. If you're looking at net yield under 1%, the property is relying entirely on price growth and equity buildup, which is a gamble, not income.

Should I buy one property or multiple?

One property is hard to scale profitably because fixed costs (insurance, admin time, mortgage fees) don't drop much. Three to five properties start to show economies of scale if you find a good lettings agent. More than five and you're running a small business, not a side income. Most people's sweet spot is two to three properties with one lettings agent handling all of them.

What if I buy a property now and prices rise 10% in five years?

You've made 23,000 on a 230,000 property. That's 4,600 a year in growth, which looks great until you realise you've paid 5,000-10,000 in net costs and repairs over that period. Your actual return is closer to 2-3%, which is what you'd have made in a savings account or dividend stocks with none of the hassle.

Related reading: How to Have Passive Income: What Works and What's Marketing Nonsense and How to Get Paid Freelance Writing Jobs (Not the Scam Ones).

For the bigger picture, see my full guide to side hustles.