Net cash advantage
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Ending wealth advantage with cash
Example calculation
Strategy comparison
Evaluating options...
Monthly HELOC payment
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Total borrowing cost
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Interest plus account fees
Break-even cash yield
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Yield needed to offset borrowing
Side-by-side strategy comparison
Contrasting cash outlay, initial liquidity, ongoing cash flow, and ending wealth over the repayment period:
| Strategy Metric | Strategy 1: Pay Cash | Strategy 2: Borrow with HELOC |
|---|---|---|
| Upfront Outlay | -- | -- |
| Day 1 Liquid Reserves | -- | -- |
| Monthly Payment Obligation | $0.00 / month | -- |
| Total Interest Paid | $0.00 | -- |
| Total Account and Closing Fees | $0.00 | -- |
| Investment Return Earned | -- | -- |
| Ending Liquid Savings | -- | -- |
| Net Financial Advantage | -- | -- |
Liquidity Consideration:
While paying cash avoids borrowing interest and fees, borrowing with a HELOC allows you to keep your liquid cash reserves intact on Day 1 for unexpected emergencies. Under the cash strategy, liquid reserves start at $0 and are rebuilt month by month as saved loan payments accumulate.
Rate stress test: Variable rate scenarios
Model note: This calculator models a constant-rate amortizing repayment schedule. Most real HELOCs feature variable interest rates that fluctuate with benchmark rates (such as the Prime Rate). Here is how rate increases would impact payments and borrowing costs:
| Scenario | HELOC Rate | Monthly Payment | Total Borrowing Cost | Net Cash Advantage |
|---|
Sensitivity: HELOC rate vs cash return
Shows the dollar advantage of paying cash across various loan rates and savings yields:
| HELOC Rate | 3.0% Cash Return | 4.0% Cash Return | 5.0% Cash Return | 6.0% Cash Return |
|---|
How this estimates
This calculator evaluates whether paying cash or taking out a Home Equity Line of Credit (HELOC) is more cost-effective for financing a home project.
Equal Starting Resources and Monthly Budgets: Both strategies are evaluated from the same starting position (cash equal to the project cost) and with identical monthly budget commitments. The cash strategy spends cash upfront and invests the avoided monthly loan payments and fees at your cash return rate. The HELOC strategy borrows to pay the contractor, preserves the initial cash in savings, and repays the debt through monthly payments.
Repayment Model: Modeled as a constant-rate fully amortizing loan over the selected term. Most HELOCs have variable rates that adjust periodically, and many feature interest-only draw periods followed by repayment. Fixed-rate HELOCs or fixed-rate draw locks may match this amortizing structure.
Tax Deductibility: Under the Tax Cuts and Jobs Act (IRS Publication 936), interest on home equity debt is deductible only if the funds are used to buy, build, or substantially improve the home securing the loan, and only if you itemize deductions on your federal return.
Disclaimer: A planning estimate based on your inputs and the assumptions shown. Actual costs and eligibility may differ. Not an offer of credit, loan pre-qualification, or financial, tax, or legal advice.