Chartered Accountants in London & Slough for Small Businesses
SBX helps you stay compliant & keep more of what you earn with expert tax, accounts, and bookkeeping services.
Use these free SBX calculators to estimate repayments, tax relief, CIS deductions, take-home pay, VAT and credit card payoff. For tailored advice or complex cases, please contact SBX Accountants.
Loan / HP Repayment Calculator
Work out estimated monthly, weekly or yearly repayments on personal loans or hire-purchase agreements using a simple APR and term input.
See your payment amount, total repayable and total interest for a clear view before you commit.
CIS Deduction Calculator
Calculate CIS tax deductions on subcontractor payments after materials. Choose 20%, 30% or gross status and see what to pay and what to report to HMRC.
Useful for contractors preparing CIS300 and keeping site payments accurate.
Business Expense Tax Savings Calculator
Estimate how much tax you could save on work-related expenses such as professional fees, tools, mileage, home-working and other allowable costs.
Select your tax band to see total eligible expenses and an estimated annual and monthly tax saving.
Credit Card Payoff Calculator
See how long it could take to clear your credit card at different payment levels and interest rates, and how much interest you might pay.
Compare minimum payments with fixed amounts to plan faster debt reduction.
Take-Home Earnings Calculator
Estimate your net pay after Income Tax and National Insurance based on your gross earnings, tax code and pay frequency.
Helpful for employees, contractors and directors planning cash flow and budgeting.
VAT Calculator
Calculate VAT on any amount using standard, reduced or zero UK VAT rates. Add VAT to net prices or remove VAT from gross figures for quick estimates.
Helpful for businesses checking invoices, preparing quotes or confirming VAT amounts for bookkeeping.
Need advice beyond the calculators?
These SBX tools give useful estimates, but they do not replace tailored tax and accounting advice. If you have multiple income sources, complex reliefs or questions about HMRC rules, our team can review your position in detail.
