Estimate your annual National Non-Domestic Rates (NNDR).
The open market rental value of the property as estimated by the VOA.
Standard: ~54.6p | Small Business: ~49.9p (2024/2025 Estimates)
No
Yes (For Rateable Value < £15,000)
Available if you only use one property and RV is less than £15,000.
Gross Rates (Before Relief):£0.00
Relief Applied:£0.00
Annual Payable Amount:£0.00
Estimated Monthly Cost (10 installments):£0.00
function calculateBusinessRates() {
// 1. Get input values
var rvInput = document.getElementById('rateableValue').value;
var multiplierInput = document.getElementById('multiplier').value;
var sbrrToggle = document.getElementById('sbrrToggle').value;
var resultsArea = document.getElementById('results-area');
// 2. Parse numbers
var rateableValue = parseFloat(rvInput);
var multiplierPence = parseFloat(multiplierInput);
// 3. Validation
if (isNaN(rateableValue) || rateableValue < 0) {
alert("Please enter a valid Rateable Value.");
return;
}
if (isNaN(multiplierPence) || multiplierPence < 0) {
alert("Please enter a valid Multiplier.");
return;
}
// 4. Calculate Gross Bill
// Formula: RV * (Multiplier / 100)
var grossBill = rateableValue * (multiplierPence / 100);
// 5. Calculate Relief (SBRR)
var reliefPercentage = 0;
if (sbrrToggle === 'yes') {
if (rateableValue 12000 && rateableValue 0) {
reliefText += " (" + reliefPercentage.toFixed(1) + "%)";
}
document.getElementById('reliefAmount').innerHTML = reliefText;
document.getElementById('netPayable').innerHTML = "£" + netBill.toLocaleString('en-GB', {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('monthlyCost').innerHTML = "£" + monthly.toLocaleString('en-GB', {minimumFractionDigits: 2, maximumFractionDigits: 2});
// Show results
resultsArea.style.display = "block";
}
How to Calculate Business Rates in the UK
Business rates are a tax on property used for commercial purposes. Calculating them correctly is essential for budgeting your overheads. The core formula used in the United Kingdom is relatively straightforward, though reliefs and adjustments can complicate the final figure.
The Basic Formula
The standard calculation for your annual business rates bill is:
Business Rates = Rateable Value × Multiplier
1. Rateable Value (RV)
Every non-domestic property has a 'Rateable Value'. This is an estimate of the property's open market rental value as of a specific valuation date. These values are determined by the Valuation Office Agency (VOA). You can find your specific RV on the government's online portal or your previous tax bill.
2. The Multiplier (Pence in the Pound)
The multiplier is the factor applied to your Rateable Value to determine your bill. It represents the number of pence you pay for every pound of Rateable Value. There are typically two multipliers:
Standard Multiplier: Applied to properties with a Rateable Value of £51,000 or more.
Small Business Multiplier: Applied to properties with a Rateable Value below £51,000.
Multipliers change annually with inflation (CPI). For example, if the multiplier is 49.9p and your RV is £10,000, your calculation would be £10,000 × £0.499.
3. Small Business Rate Relief (SBRR)
Many small businesses are eligible for significant discounts through Small Business Rate Relief. This calculator applies the standard sliding scale for SBRR:
RV up to £12,000: You get 100% relief. You pay £0.
RV £12,001 to £15,000: You get tapered relief. The discount decreases from 100% at £12,000 to 0% at £15,000.
RV over £15,000: You do not qualify for SBRR, though you may still use the lower Small Business Multiplier if your RV is under £51,000.
Example Calculation
Imagine your shop has a Rateable Value of £13,500.
Because the RV is under £51,000, we use the Small Business Multiplier (e.g., 49.9p or 0.499).
Gross Bill: £13,500 × 0.499 = £6,736.50.
Relief: Since £13,500 is exactly halfway between £12,000 and £15,000, you receive 50% relief.
Discount: £6,736.50 × 50% = £3,368.25.
Final Bill: £3,368.25 per year.
Note: This calculator provides an estimate based on the standard English business rates system. Actual bills may vary due to Transitional Relief, Crossrail supplements (in London), or specific local council adjustments.