Vacation Sinking Fund Planner
Vacation Sinking Fund Calculator — Weekly Transfer Planner
What this calculator does
A sinking fund flips the usual vacation math: instead of booking the trip and finding the money afterwards, you set the departure date and let the calendar dictate the weekly transfer. Enter the trip cost, what you have saved so far, and the departure date; the calculator divides the gap by the weeks remaining and hands you one number to automate. If that number doesn't fit the budget, the same arithmetic shows your real options — a later date, a cheaper trip, or a bigger head start.
The math, with a worked example
Weeks until departure = (departure date − today) ÷ 7 days. Weekly transfer = (trip cost − current savings) ÷ weeks. A $2,000 trip with $400 saved and 24 weeks to departure leaves a $1,600 gap: $66.67 a week. Book the same trip with only 12 weeks left and the transfer doubles to $133.33 — the cost of the trip didn't change, the runway did. Start 48 weeks out and it falls to $33.33, which is why the date you open the fund matters more than the amount you start with.
Why this matters
A trip funded before departure costs its sticker price; the same trip on a card costs sticker plus months of interest. $2,000 minus $400 saved, over 24 weeks, is $66.67 a week — the whole difference between a sinking fund and a debt.
Methodology and transparency
Weekly transfer = (trip cost − saved) ÷ weeks until the departure date. The trip-cost input is the honest one to inflate: flights and hotels are the number people enter, while food, transit, and the airport tab are what actually breaks budgets — add a per-day spending estimate before trusting the weekly figure. Everything runs in your browser; no data is sent or stored.
Last reviewed: 2026-08-09
Common questions
What if I have no savings?
The weekly amount equals the full trip cost divided by weeks until departure.
Can I use this for non-vacations?
Yes. Any date-based savings goal works the same way: a deposit, a wedding, holiday gifts, annual insurance. Cost minus saved, divided by weeks left.
Why weekly instead of monthly?
Smaller, more frequent transfers fail less often: missing one $67 week costs $67 of progress, while missing one $289 month costs a whole month. Multiply the weekly figure by 4.33 if your bank only automates monthly.
What happens if the trip price goes up?
Re-run the calculator with the new cost and today's date. The gap gets spread over fewer remaining weeks, so a late price rise moves the weekly number more than an early one — a $200 increase 20 weeks out adds $10 a week, but 4 weeks out adds $50.
Why fund the trip before booking instead of paying it off after?
Direction of interest. Saved first, the trip costs its sticker price. Charged to a card and paid off over the following months, the same trip costs sticker plus interest at card rates — the calculator's weekly number is what buying the interest-free version costs.