About BusCalcTools
Built by James Blanckenberg — Founder, BusCalcTools.
I started BusCalcTools after watching too many small business owners make pricing decisions on bad maths. The 50% markup ≠ 50% margin mistake alone costs UK and US small firms an estimated five-figure sum per year — multiplied across millions of businesses, that's a lot of profit left on the table.
The site exists for one job: give business owners a calculator that loads in under two seconds, runs entirely in the browser, switches between US, UK, and South Africa tax rules automatically, and tells you what your numbers actually mean instead of just spitting out a percentage.
I previously built FinnCalc — a sister site covering personal-finance calculators — using the same philosophy. Both projects are fully independent: no client work, no investors, no agenda beyond making the maths accessible.
If a calculator on this site has produced a result that contradicts your accountant, your accountant is probably right — the calculators are designed as a fast sanity check, not professional advice. Sources for tax rates and benchmark figures are linked on each calculator page.
What we publish
18 calculators across four topic clusters, plus 25 long-form guides. Every calculator runs entirely in your browser; we don't collect or transmit the numbers you enter. Tax and rate defaults are sourced from primary government sources (IRS, HMRC, SARS) and dated on each calculator page.
Editorial policy
- Sources. Tax rates, loan benchmarks, and employer cost percentages are sourced from primary government data (IRS, HMRC, SARS) plus reputable industry sources for benchmarks (SBA, BDO, BoE). Each calculator page lists its sources with last-verified dates.
- Updates. Tax rates are reviewed every 12 months or when a region changes its corporate or consumption tax rate. Articles are reviewed annually for accuracy.
- Not financial advice. These calculators are educational tools. They are accurate for the inputs you provide but they do not know your individual circumstances. Consult a qualified accountant or financial adviser before making business decisions.
- AI disclosure. Some article drafts were initially prepared with AI assistance and then edited and fact-checked by James. Calculator logic, calculations, and tax rates are hand-written and reviewed manually.
- Monetisation. The site is supported by display advertising. We have no affiliate relationships with banks, lenders, accountants, or financial product providers mentioned in articles.
Contact
Spotted a bug, an out-of-date tax rate, or a feature request? Email [email protected].