Question 1

Contribution does the heavy lifting

Accepted Answer

For short and medium goals, the monthly amount you save matters far more than the return rate — there isn’t enough time for compounding to dominate. For a house deposit a few years out, focus on the monthly number, not on chasing yield.

Question 2

What return rate to use

Accepted Answer

For a goal a year or two away, keep the money in cash or a high-interest savings account and use a low rate (or 0). Only goals many years out justify investing for a higher — but riskier — return that could fall just when you need the money.

Question 3

Reaching it by a deadline

Accepted Answer

If you have a target date, divide the remaining gap by the months available for a rough required monthly amount, then adjust the contribution here until the time-to-goal matches. Small increases move the date a surprising amount.

Question 4

Common mistakes

Accepted Answer

Assuming an optimistic return for a near-term goal; forgetting that contributions, not growth, drive short timelines; and not automating the transfer, so the saving never actually happens.

貯蓄目標シミュレーター — 目標まであとどれくらい

拠出が主役

どの利回りを使うか

期限までに達成する

よくある間違い

できないこと