Fixed-rate period versus total loan term

Short answer #

Total term describes full mathematical repayment; the fixed-rate period only the agreed-price interval. Show payment and balance at both dates.

Important variables #

• Price, rent and holding period
• Rate, principal and remaining balance
• Buying, maintenance and selling cost
• Appreciation and alternative return

Worked example #

A 30-year total term with 10 years fixed leaves 20 years of rate risk on the remaining balance.

Break-even: What changes the result? #

Test the main driver as a cautious, central and optimistic range. Also check whether the ranking reverses at a crossover or remains robust across the range.

Common mistakes #

• Comparing mortgage payment directly with rent
• Omitting transaction cost or remaining debt
• Treating appreciation as guaranteed

Sources & assumptions

• Deutsche Bundesbank — Bank Lending Survey Germany, July 2026 (2026-08-17)
• RATIOXA — Methodology and formulas (2026-08-17)