The Great Debate: Lowering Monthly Payment vs. Shortening Term

It is the question every homeowner asks the moment they have some extra cash: "Should I lower my monthly bill or finish the mortgage sooner?"

Most people answer this based on intuition. Some crave the psychological freedom of being debt-free (Shorten Term). Others want the safety of a lower monthly obligation (Lower Payment).

But at AmortiApp, we don't rely on intuition. We rely on math. And the math says: it depends on what you do with the money.

The Problem: The Hidden Cost of Comfort

Choosing to lower your monthly payment feels safe. It immediately frees up cash flow. If your mortgage drops from €1,200 to €1,000, you have €200 extra in your pocket every month.

But here is the trap: Time is expensive.

By keeping the original term (e.g., 25 years), you are allowing the bank to charge you interest on the remaining capital for much longer than necessary. You are trading long-term wealth for short-term comfort.

The Agitation: You Are Losing Thousands

Let’s look at the cost of that comfort.

If you have a €200,000 mortgage at 4% interest with 20 years left, and you make a lump sum payment of €10,000:

• Option A (Shorten Term): You save approximately €12,500 in interest and finish the loan ~1.5 years early.
• Option B (Lower Payment): You save only €4,800 in interest. Your monthly bill drops, but the bank keeps you on the hook for the full 20 years.

By choosing Option B, you are effectively setting fire to €7,700. That is the price of your "lower monthly bill."

The Solution: The "Opportunity Cost" Rule

However, being an Analyst means looking at the whole picture. Option B isn't always bad. It depends on Opportunity Cost.

If you choose Option B (Lower Payment), you get extra cash each month. If—and only if—you invest that extra cash at a rate higher than your mortgage interest (4%), Option B wins.

• The Rule:
  • Choose Term Reduction if you are conservative, hate debt, or your investments yield less than your mortgage rate.
  • Choose Payment Reduction if you need liquidity for safety, or if you can invest the difference at a significantly higher rate (e.g., 7-8%).

📱 The Amorti Simulation

Don't guess. Prove it with your own numbers.

1. Open AmortiApp.
2. Enter your current loan details (Principal, Rate, Remaining Term).
3. Go to the "Extra Payments" section.
4. Enter a simulated lump sum (e.g., 5,000).
5. Toggle between "Reduce Term" and "Reduce Payment".

Look at the "Total Interest" field. The difference you see there is your answer.

Analyst Tip: If the interest savings from "Reduce Term" are huge (e.g., >€10k), it’s rarely worth reducing the payment unless you are struggling to pay bills.

Stop guessing with your net worth. Run the math.

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