The Two Builders Story
An illustration. Sid and Roy are invented. The figures are simplified and rounded, and use 2026/27 UK tax rates. They are not advice: speak to an accountant about your own position. BuildROI is at proposal stage, and no live projects have been completed.
👨🔧 Same Age. Same Skills. Different Choices.
Meet two 30-year-old builders. Both are self-employed, and both earn about £60,000 a year. The difference is how much of it is on the record.
Sid
Age 30, self-employed builder
Mostly cash
Total tax and NI: about £1,400/year
About 2% of his £63,000 real income
Not enough for a fixer-upper at £180,000.
Body wearing out • Heavy work gets harder • Still renting
No home. Assets: about £10,000
The State Pension doesn't cover the rent. With little saved, he would depend on Pension Credit and Housing Benefit to fill the gap.
Roy
Age 30, self-employed builder
Everything on the record
Total tax and NI: about £13,900/year
About 23% of his income
Roy has about £15,500 LESS per year than Sid
"It's frustrating, but I can't argue Sid isn't crushing it!"
Gets a mortgage: £180,000 for a fixer-upper
His skills add about £60,000 of value for about £20,000 of materials, so the house is worth about £240,000.
Can start cutting back to fewer days
Perhaps in a verifying or mentoring role. His body thanks him.
Total assets: about £920,000
NO RENT • Independence • Dignity • Legacy
📊 The Comparison
Total lifetime picture (age 30 to retirement)
Sid
Take-home: about £61,600 a year
Rent paid: about £555,000 over 37 years
Wealth at retirement
Roy
Take-home: about £46,100 a year
But built: a home worth about £675,000 plus a pension pot of about £245,000
Wealth at retirement
Sid had about £390,000 MORE to spend over 25 years
Roy ends with about £910,000 MORE in assets
⚠️ Age 55
Sid has taken home about £1.5 million over 25 years. He has about £10,000 in savings, and he still rents. His knees are going. On the income he can show, he couldn't borrow enough to buy a home now.
Roy has "only" taken home about £1.15 million over the same 25 years. But he has about £450,000 of equity and about £125,000 in his pension. He owns his future.
Perception vs Reality
There is a case for both options:
- Sid pays far less tax (about 2% of his real income, against Roy's 23%)
- Sid has more cash to spend year to year
- Sid's life FEELS better for years 30 to 45
Because:
- Wealth isn't what you spend, it's what you BUILD
- About £390,000 extra spending against about £910,000 extra assets puts Roy about £520,000 ahead
- Sid's retirement: a State Pension of about £12,500 a year, against rent of about £15,000 a year, with little saved to fill the gap
- Roy's retirement: a home he owns outright, plus the State Pension and his own pension pot
You Don't Have to Change Overnight
Many builders who have worked mainly in cash won't change everything at once, and BuildROI doesn't expect them to. But we draw a line: BuildROI will never help hide income from HMRC. Jobs that go through BuildROI are recorded, and over time the record is what lets you borrow, save and build.
We don't give tax advice. If you're unsure where you stand, speak to an accountant.
The Bottom Line
"Sid will have had about £390,000 more to spend than Roy over 25 years... and about £910,000 less to show for it. Sid's money went through his hands. Roy's went into bricks and mortar he owns."
How These Figures Were Worked Out
- Tax (2026/27, England, Wales and Northern Ireland): £12,570 personal allowance, 20% on the next £37,700, 40% above £50,270. Class 4 National Insurance at 6% between £12,570 and £50,270, and 2% above. Roy's tax is shown before pension tax relief.
- Lending: lenders typically offer around four to four-and-a-half times the income they can see. Lenders differ.
- Property: house prices rise 3% a year. Roy has a 25-year repayment mortgage at 5.5%. His skills add about £60,000 of value to the fixer-upper.
- Pensions: Roy pays £200 a month (£250 with basic-rate tax relief), growing 4% a year after charges, until retirement. The full new State Pension is £12,547.60 a year in 2026/27.
- Sid: rents at about £15,000 a year. He saves little: about £10,000 by 55 and at retirement. Extra cash with no plan for it tends to get spent.
- Simplifications: no children or benefits, the same income every year, and no other changes. Asset figures are in future money, not adjusted for inflation. The State Pension and rent are in today's money. The comparison matters more than the exact figures.