401(k) Loan Calculator
Calculate 401(k) loan repayment, interest paid back to yourself, and the opportunity cost of lost market returns. See the true cost of borrowing from retirement.
Economic Injury Disaster Loan (EIDL) Calculator
Model SBA EIDL repayment for existing loans. Estimate monthly payments, deferment impact, and long-term cost for existing EIDL scenarios.
$
%
yrs
months
$
$
Monthly Payment⧉
$734.69
After deferment period
Est. Max Eligible⧉
$1,800,000.00
Based on gross profit × 6
Balance After Deferment⧉
$155,723.00
$5,723.00 interest accrued
Total Interest⧉
$105,670.00
70.4% of loan amount
Total Repaid⧉
$255,670.00
Over the full loan term
Deferred Interest⧉
$5,723.00
12 months at 3.75%
Interest Proportion
Principal
Interest (70.4%)
Loan Amount Comparison
| Loan Amount | Monthly Payment | Total Interest | Total Paid |
|---|---|---|---|
| $25,000.00 | $122.45 | $17,612.00 | $42,612.00 |
| $50,000.00 | $244.90 | $35,223.00 | $85,223.00 |
| $100,000.00 | $489.79 | $70,447.00 | $170,447.00 |
| $150,000.00 | $734.69 | $105,670.00 | $255,670.00 |
| $200,000.00 | $979.58 | $140,894.00 | $340,894.00 |
| $350,000.00 | $1,714.27 | $246,564.00 | $596,564.00 |
| $500,000.00 | $2,448.95 | $352,235.00 | $852,235.00 |
Annual Amortization
| Year | Principal | Interest | Balance |
|---|---|---|---|
| 2 | $3,028.00 | $5,788.00 | $152,694.00 |
| 3 | $3,144.00 | $5,672.00 | $149,551.00 |
| 4 | $3,264.00 | $5,552.00 | $146,287.00 |
| 5 | $3,388.00 | $5,428.00 | $142,898.00 |
| 6 | $3,518.00 | $5,299.00 | $139,381.00 |
| 7 | $3,652.00 | $5,164.00 | $135,729.00 |
| 8 | $3,791.00 | $5,025.00 | $131,938.00 |
| 9 | $3,936.00 | $4,880.00 | $128,002.00 |
| 10 | $4,086.00 | $4,730.00 | $123,916.00 |
| 11 | $4,242.00 | $4,574.00 | $119,675.00 |
| 12 | $4,404.00 | $4,413.00 | $115,271.00 |
| 13 | $4,572.00 | $4,245.00 | $110,699.00 |
| 14 | $4,746.00 | $4,070.00 | $105,953.00 |
| 15 | $4,927.00 | $3,889.00 | $101,026.00 |
| 16 | $5,115.00 | $3,701.00 | $95,911.00 |
Planning notes, formulas, and examples
About the Economic Injury Disaster Loan (EIDL) Calculator
The Economic Injury Disaster Loan (EIDL) was an SBA loan program designed to provide working capital to small businesses affected by declared disasters. With a fixed 3.75% interest rate for businesses (2.75% for nonprofits) and 30-year terms, EIDLs offered unusually favorable long-term financing.
Understanding EIDL repayment is critical for cash flow planning. The deferment period (during which interest accrues) increases the total cost. Monthly payments after deferment must be budgeted alongside normal operating expenses. Many borrowers are already in repayment.
This calculator models the complete EIDL repayment scenario including deferment period interest accrual, post-deferment monthly payments, and total cost over the 30-year term. It also estimates maximum eligible loan amounts based on gross profit. The comparison table shows payments at different loan amounts to help you evaluate how much to borrow. It is best read as a historical repayment model for existing EIDL borrowers, especially when the payment start date, accrued deferment interest, and long repayment term need to be seen together in one plan.
When This Page Helps
EIDL terms were unique — the combination of low fixed rate, long term, and deferment period made standard loan calculators misleading. This calculator properly accounts for deferred interest accrual and shows the true cost of the loan after deferment ends. That makes it easier to review repayment cash flow for an existing loan.
How to Use the Inputs
- Enter your EIDL loan amount or explore different amounts.
- Confirm the interest rate (3.75% for businesses, 2.75% for nonprofits).
- Set the loan term (typically 30 years).
- Enter the deferment period in months.
- Add revenue and COGS for eligibility estimate.
- Review monthly payment, total cost, and amortization schedule.
Formula used
Deferred Balance = Loan × (1 + Monthly Rate)^Deferment Months. Monthly Payment = Deferred Balance × [r(1+r)^n] / [(1+r)^n − 1]. Historical EIDL approvals were often framed around economic injury and SBA review rather than a single universal formula.Example Calculation
Result: Payment: $735/mo — Deferred interest: $5,723 — Total interest: $105,670
A $150,000 EIDL at 3.75% for 30 years with 12 months of deferment accrues about $5,723 of interest before repayment starts, raising the balance to roughly $155,723. Monthly payments after deferment are about $735. Total interest over the life of the modeled loan is about $105,670.
Tips & Best Practices
- Interest accrues during the deferment period even though no payments are due — budget accordingly.
- Consider making interest-only payments during deferment to prevent balance growth.
- The 3.75% rate is fixed for the entire 30 years — there is no rate adjustment risk.
- Early prepayment is allowed with no penalty — extra payments can significantly reduce total interest.
- Historical EIDL caps changed over time, so treat this as a repayment model rather than a live eligibility checker.
- Loan-use restrictions came from the SBA program rules in force for the disaster loan; confirm them from your loan documents if you are still in repayment.
Why EIDL Works Differently
EIDL loans combine three features that change the repayment math: a long 30-year term, a low fixed SBA rate, and an initial deferment period in which interest still accrues. That means the balance at first payment can already be higher than the amount originally disbursed.
Deferment Changes the True Cost
Because interest builds during deferment, the monthly payment you see at repayment start is based on a larger balance than the original loan amount. Borrowers who only look at the headline interest rate often miss this and underestimate the total cost of carrying the loan for decades.
Borrowing Less Can Matter More Than The Rate
At a low fixed rate, the main decision is often loan size rather than interest cost alone. Running several loan amounts side by side helps show whether the extra working capital meaningfully improves the business enough to justify the additional long-term repayment burden.
Sources & Methodology
Last updated:
Methodology
This worksheet treats the entered EIDL amount as an existing loan balance, accrues interest during the selected deferment period, then amortizes the deferred balance over the remaining term to estimate the post-deferment monthly payment and total interest cost. It also shows a simplified eligibility estimate based on gross profit multiplied by six because earlier COVID-era EIDL discussions often used revenue and cost-of-goods context when exploring rough working-capital needs.
The page is meant for repayment planning on historical or existing EIDL debt, not as a live approval predictor. Final SBA loan size, deferment treatment, collateral rules, and servicing options were determined by SBA program rules and borrower-specific documentation, so borrowers should verify the repayment obligations shown inside MySBA and their original note.
Sources
- Manage your EIDL (U.S. Small Business Administration) — Official SBA servicing page confirming that new COVID EIDL applications are closed, interest accrues during deferment, and regular payments begin 30 months from disbursement.
- About COVID-19 EIDL (U.S. Small Business Administration) — Official SBA historical program page listing the fixed 3.75% business rate, 2.75% nonprofit rate, long term, and no-prepayment-penalty framework.
Frequently Asked Questions
The fixed rate is 3.75% for businesses and 2.75% for nonprofits. These rates are set by law and do not vary based on credit score or market conditions. The rate remains fixed for the entire 30-year term.
Payments begin after the deferment period ends. The initial deferment was 12 months from the loan origination date, later extended to 30 months for many borrowers. Interest accrues during deferment and capitalizes into the loan balance.
Yes, there is no prepayment penalty. You can make extra payments at any time to reduce the principal and total interest cost. Making additional payments during the deferment period reduces the interest that accrues.
Contact the SBA immediately to discuss hardship options. Defaulting on an EIDL can result in collection actions, referral to Treasury, and potentially personal liability if you signed a personal guarantee (required for loans over $200,000).
Historical EIDL approvals were based on economic injury, SBA documentation review, and the disaster-program rules in force at the time. Use this calculator to model repayment, not to predict whether a comparable disaster-loan approval path would still be available.
No, EIDL is a loan that must be fully repaid. Only the EIDL Advance ($10,000 targeted advance or $1,000 supplemental advance) was a grant that did not require repayment. The main EIDL loan itself is not forgivable.
More in this topic
Amortization Calculator
Calculate loan amortization schedules showing monthly payment breakdown of principal, interest, extra payments, and remaining balance over time.
APR Calculator
Calculate the Annual Percentage Rate (APR) for any loan including fees, points, and closing costs to reveal the true cost of borrowing.