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Loan Agreements Guide: Loan Contract, Promissory Note & Convertible Note

What you’ll learn: principal and APR, repayment schedules, late fees, collateral/security interests, default remedies, and prepayment—plus a checklist, common pitfalls, and when to use a promissory or convertible note instead.

Loan Agreements: Fund Growth Without Risking the Relationship

Growth requires capital — but lending or borrowing without clear terms can ruin partnerships. A Loan Agreement helps protect everyone involved by defining how much is borrowed, how it’s repaid, and what happens if things go wrong.

What Is a Loan Agreement?

A Loan Agreement is a contract between a lender and borrower that formalizes the repayment terms, interest rate (if any), and consequences for missed payments. Whether it’s between business partners, family, or outside investors, it ensures alignment and reduces risk.

Key Terms Usually Include:

  • Total Amount Loaned (Principal)
    This is the base amount of money being borrowed — the original sum that the borrower agrees to repay before interest or fees are added. It should be clearly stated upfront to avoid any confusion.
  • Interest Rate or 0% Structure
    Specify whether the loan accrues interest, and if so, at what rate. Is it fixed (the same over time) or variable (changes based on market rates)? If there’s no interest (a 0% loan), it’s still important to document that to prevent future misunderstandings.
  • Repayment Schedule (Installments, Lump Sum, etc.)
    Detail how and when the loan must be repaid. Will the borrower make monthly payments, quarterly payments, or one full payment at the end? Clearly stating this helps both parties plan financially and avoid disputes.
  • Late Fees and Default Consequences
    Describe any penalties for late payments — such as flat fees or increased interest — and what happens if the borrower stops paying altogether. This can include legal action, repossession of collateral, or accelerated repayment.
  • Collateral Terms (If Applicable)
    If the loan is secured, include a description of the asset(s) being pledged. Collateral could be business equipment, real estate, or vehicles. The agreement should explain the lender’s rights if the borrower fails to repay.
  • Prepayment or Early Payoff Options
    Clarify whether the borrower can pay off the loan early — and if so, whether any penalties or discounts apply. Some agreements include a fee for early payoff to compensate the lender for lost interest income.

When to Use One

✅ Borrowing from a friend, investor, or employee
✅ Lending funds to partners or contractors
✅ Adding interest or collateral to an informal loan
✅ Needing legal backup in case of disputes or tax audits

Checklist: What to Include in a Loan Agreement

  • Names of Borrower and Lender
    Identify the full legal names and contact information of both parties. This ensures there's no ambiguity about who owes and who is owed — especially important if disputes arise or collection efforts are needed.

  • Loan Amount and Interest Rate
    Clearly state the total amount being loaned (called the “principal”) and whether interest will be charged. If interest applies, include the rate (fixed or variable), how it accrues, and how it's calculated.

  • Repayment Terms and Schedule
    Define when and how the borrower will repay the loan. Will it be paid back in monthly installments, quarterly lump sums, or a single balloon payment at the end? Include due dates and any grace periods.

  • Collateral (If Any)
    If the loan is secured, list the collateral (e.g., equipment, property, inventory) that the lender can claim if the borrower defaults. Include how the collateral will be handled and any related valuation or repossession terms.

  • Late Payment Penalties
    Spell out what happens if a payment is missed or late. Will there be a flat fee? Additional interest? Include any grace period and how penalties are calculated.

  • Modification and Refinancing Rights
    Include whether the parties can change the loan terms later — such as extending the repayment period or adjusting the interest rate — and how such changes must be documented (e.g., written addendum signed by both parties).

  • Default Conditions and Recourse
    Explain what constitutes a “default” — such as missed payments, bankruptcy, or misuse of funds — and what the lender can do in response (e.g., accelerate repayment, seize collateral, take legal action).

  • Signatures and Date
    Include space for both parties to sign and date the agreement. A signed contract is essential for enforcement in court and for establishing the legal start date of the loan.

Pro Tip: Even if there’s no interest, a written agreement prevents misunderstandings.

⚠️ Vague Terms = Disputes Over Repayment
Unclear or loosely defined terms (e.g., “pay back whenever you can”) can lead to confusion or disagreement about deadlines, payment amounts, and expectations. This ambiguity opens the door to broken relationships and legal conflict.

⚠️ No Default Clause = Unclear Consequences
If your contract doesn’t define what counts as a default — and what happens when it occurs — you may be powerless to act when payments are missed. Clear default provisions give you legal leverage to recover what you’re owed.

⚠️ No Collateral = Increased Risk
If the borrower defaults and there’s no collateral, the lender has limited ways to recoup their losses. Collateral gives lenders added protection and a tangible fallback if the loan isn’t repaid.

⚠️ Verbal Agreement = Unenforceable in Most Jurisdictions
Handshake deals or verbal promises may feel friendly, but they rarely hold up in court. Most states require written contracts — especially for loans over a certain amount — to be legally binding and enforceable.

Loan Agreement vs. Promissory Note vs. Convertible Note

Contract Type Purpose Best For
Loan Agreement Full repayment terms and collateral Business, friends/family lending
Promissory Note Simple repay promise One-time personal or short-term
Convertible Note Converts to equity later Startup or pre-seed investmentsLegal Tip: “If you're lending money without consequences for default, you're not just being generous — you're taking a legal risk.” — Jerome P., Commercial Finance Attorney

 

Build Your Loan Agreement

✅ Lending money to a partner or business? Protect your terms from the start.

Use SMVRT Legal’s Loan Agreement Template to create a clear, legally binding contract that outlines repayment, interest, and responsibilities.👇 

Build Your Loan Agreement Now >

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