🌡️ ThermoVault Complete Financial Calculator

Adjust every variable — installation costs, energy rates, tax credits, demand charges — and see your real savings instantly

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🏢 Building Information

This is an example. Change the building size and costs to match your actual project. All calculations update automatically.

🔧 Shared Equipment (Both Systems)

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🔴 Borehole-Specific Costs

Items unique to borehole drilling systems
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🟢 Trench (Thermal Storage) Costs

Items that ARE ITC eligible because they are part of the thermal storage system
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🏛️ Section 48E Investment Tax Credit (ITC)

What is ITC? A dollar-for-dollar reduction in your federal tax bill. If you owe $100,000 in taxes and have a $75,000 credit, you only pay $25,000.
Base ITC Rate 30%
6% (minimum)30% (standard — auto-qualified)
Bonus Credits (add to base rate)
Your combined ITC rate: 30%
Most building-scale systems automatically qualify for 30% because they're under 1 megawatt. No special paperwork needed.

📋 Bonus Expensing (OBBBA 2025)

What is Bonus Expensing? Under the One Big Beautiful Bill Act (signed July 2025), you can deduct 100% of the remaining cost in Year 1. This is a SECOND tax benefit on top of the ITC.
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Tax Bracket35%
10%21% (Corp)37% (Top)
⚠️ Basis reduction applies: when claiming ITC, depreciable basis is reduced by 50% of ITC amount before bonus expensing is calculated.

📊 Tax Credit Summary

BenefitBoreholeTrench
Gross Cost$244,708$191,511
ITC Rate Applied30%
Investment Tax Credit$69,443$75,204
Depreciable Basis (after ITC)——
Bonus Expensing Savings——
TOTAL YEAR 1 TAX BENEFIT$69,443$75,204
Net Cost After All Benefits$175,265$116,307
🏆 YOUR SAVINGS WITH TRENCHES$58,958

🔍 ITC Eligible Items Breakdown

ItemBoreholeTrenchExtra Credit
Heat Pump Equipment✓✓—
Excavation / Site Prep✗ No✓ Yes+$16,000
Drilling / Thermal Fill✓ Drilling✓ Fill—
Underground Insulation✗ No✓ Yes+$3,200
PEX Tubing, Controls, Soft Costs✓✓—
EXTRA ITC CREDIT FOR TRENCHES$19,200

⚡ Your Electricity Rates

Where to find your rates: Check your utility bill or call your utility company. Commercial rates vary widely by location.
Energy Rates (kWh)
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Demand Charges (kW)
What is a demand charge? Utilities charge for your PEAK usage (like a speed limit fine) not just total usage. ThermoVault eliminates this by storing energy during off-peak hours.
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🔥 Current Heating Fuel — Build Your Cost From Unit Prices

New: Set your actual fuel unit price (per therm, gallon, or kWh) and annual consumption. Your annual costs recalculate automatically. Or skip all that and type your bill totals directly below.
Step 1 · Fuel Unit Prices
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Step 2 · Annual Costs (auto-calculated · override if you have actual bill totals)
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🌡️ ThermoVault Energy Performance

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COP (Efficiency Rating)4.0
2.5 (low)4.0 (typical)5.0+ (optimal)
% Operation Shifted to Off-Peak60%
0% (no shift)60% (typical)100%

📊 Energy Cost Comparison

SystemHeatingCoolingDemandAnnual Total
Natural Gas + AC$5,854$2,160$3,600$11,614
ThermoVault$1,210$850$0$2,060
💰 YOUR ANNUAL ENERGY SAVINGS$9,554

📅 Long-Term Savings Projection

YearCurrent System CostThermoVault CostSavingsCumulative Saved

📈 Energy Savings Visual

TOTAL SAVINGS WITH TRENCHES (THERMAL STORAGE)

$58,958

Lower installed cost + Higher tax credits

Borehole Net Cost

$175,265

Trench Net Cost

$116,307

Annual Energy Savings

$9,554/yr

Long-Term Savings

$286,620

🏗️ Full Installation Comparison

ItemBoreholeTrench
Heat Pump Equipment$48,000$48,000
Excavation / Site Prep$35,000$40,000
Drilling / Thermal Fill$90,000$22,000
Grout / Slab Prep$10,000—
PEX Tubing$7,000$7,000
Underground Insulation$8,000$8,000
Grading & Compaction$3,500$3,500
Piping & Ground Loop$8,600$8,600
Controls & Electrical$17,500$17,500
Soft Costs$23,550$23,550
Sales Tax$4,558$7,361
GROSS COST$244,708$191,511
Investment Tax Credit-$69,443-$75,204
Bonus Expensing Savings——
NET COST$175,265$116,307
💰 SAVINGS WITH TRENCHES$58,958

📊 Visual Comparison

⚡ Energy Summary

CategoryCurrent SystemThermoVaultAnnual Savings
Heating$5,854$1,210$4,644
Cooling$2,160$850$1,310
Demand Charges$3,600$0$3,600
ANNUAL TOTAL$11,614$2,060$9,554
TOTAL OVER 30 YEARS$286,620
⚠️ Disclaimer: This calculator is for educational purposes only. Actual costs, tax credits, and savings will vary based on your specific project, location, and tax situation. Consult a licensed contractor and tax advisor before making financial decisions.