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Estimate TNUoS, DUoS, BSUoS, and all non-commodity costs · 2026/27 tariffs

⚠ TNUoS Alert: Charges rising 60–64% from 1 April 2026 under RIIO-ET3. Total TNUoS revenue: £4.3bn → £7bn.
Step 1 Site Details
2,500 MWh/yr
TCR Band 3 (501–1,000 kVA)
Step 2 Profile
Step 3 Charging Year
—Total Non-Commodity
—Per MWh
—% of Delivered Costat £65/MWh wholesale
—TNUoS Alone
Cost Breakdown Waterfall2026/27
Detailed Breakdown
5-Year Forecast
Cost Composition
'); w.document.close(); setTimeout(function(){w.print()},500); } // Run on load calc(); // Update hint when capacity changes document.getElementById('iCap').addEventListener('input',function(){ var v=parseInt(this.value)||0; var b=getBand(v); document.getElementById('capHint').textContent=b.n+' ('+(v<=100?'0–100':v<=500?'101–500':v<=1000?'501–1,000':'1,000+')+' kVA)'; }); document.getElementById('iCon').addEventListener('input',function(){ var v=parseInt(this.value)||0; document.getElementById('conHint').textContent=(v/1000).toLocaleString()+' MWh/yr'; });