Budget like a person who keeps the receipts.

The Exchange Board — Indicative mid-market, USD base.

Numbers refresh daily. This is the orientation you do at the kitchen table before booking — not a transaction price. Your card and your ATM will both add a small spread on top, but a 0%-FX credit card and a fee-free ATM card keep that spread inside 1%.

• USD/EUR — 0.918 — Eurozone
• USD/GBP — 0.789 — United Kingdom
• USD/JPY — 151.42 — Japan
• USD/THB — 36.80 — Thailand
• USD/MXN — 16.45 — Mexico
• USD/CHF — 0.876 — Switzerland

Chapter I — Before You Go. The math you owe yourself.

Pre-trip budgeting, savings targets, currency. The work you do at the kitchen table buys you the freedom to stop checking your phone at the cafe. Pretending you don't have a number is the most expensive thing a traveler can do. Naming the number, dividing it across the months you have, and adding a 15% buffer is the cheapest insurance you'll ever buy against arriving home with a credit card you're scared to open.

The three pre-trip line items

• Savings target. Total trip cost ÷ months until departure × 1.15. The 15% buffer is for the line items you'll forget — eSIM, baggage fee, taxi from the train station, the dinner you upgrade because you finally got there.
• Currency strategy. Lock a rate watch at T-60 days. Re-check at T-14. If the rate has moved more than 4% against you, pre-load a multi-currency card (Wise, Revolut) to lock the better window. Don't day-trade currencies — set the watch and forget it.
• The two-card stack. A 0%-FX credit card for the register (Capital One Venture, Chase Sapphire, Bilt). A no-fee ATM debit card for cash (Schwab Investor Checking, Charles Schwab High Yield, or Fidelity Cash Management). Don't use a debit card at the register — fraud math is brutal.

The savings ladder, in plain numbers

Below is the monthly savings target by trip cost and time horizon. Print it, tape it to the fridge, and reverse-engineer your trip from your monthly cash flow rather than from a destination ad. The number you can hit every month is the number you can fund without re-financing your life.

• $3,000 trip: 12 months out = $250/mo · 9 months = $334/mo · 6 months = $500/mo · 3 months = $1,000/mo · 1 month = $3,000.
• $6,000 trip: 12 months out = $500/mo · 9 months = $667/mo · 6 months = $1,000/mo · 3 months = $2,000/mo · 1 month = $6,000.
• $12,000 trip: 12 months out = $1,000/mo · 9 months = $1,334/mo · 6 months = $2,000/mo · 3 months = $4,000/mo · 1 month = $12,000.
• The 15% buffer. Add it on top. A $6,000 trip at 9 months out is $767/mo, not $667. The buffer is the visa fee, the eSIM, the upgrade, the tip, the unbudgeted dinner that turned into the best meal of the trip.

Currency, the way it actually works

You will see four exchange rates in your travel life. The mid-market rate (Google, XE, Wise) is the truth. Your bank's currency order desk is mid-market plus 3–5%. Airport currency kiosks are mid-market plus 8–12%. A bank ATM with a no-fee debit card is mid-market plus less than 1%. The difference between the worst and best on a $1,500 cash budget is roughly $150 — a hotel night, or a dinner with wine.

Pull cash from a bank-branded ATM on arrival. Withdraw enough for 4–5 days of cash-only spending — markets, taxis, tips. Refill from a bank ATM, not a kiosk. Keep $50 USD in a separate pocket as emergency-exit cash. Read more: How To Find Cheap Flights Without Tedious Tab-Hopping. 8 min read.

Chapter II — Getting There. Flights, trains, the way in.

The line item people guess wrong on by 30%. Knowing the real number lets you fund the thing you actually flew across the world for. The fare table below is what people actually paid in the last 90 days, not the headline ad price. Headline prices are marketing. The median is the truth.

The fare reference table

• International long-haul (NYC → Tokyo, economy): low $680, median $1,150, high $1,820. Book at T-90 days for the floor. Going past T-30 doubles your odds of paying the high.
• International medium (NYC → London, economy): low $420, median $680, high $1,100. Mon/Tue departures are cheaper than weekends by about 18% on the median.
• Domestic coast-to-coast (US, economy): low $210, median $340, high $520. Tuesday is the cheapest departure day. Avoid Friday afternoons and Sunday evenings — premium-paid window.
• Regional (London → Rome, economy): low $48, median $120, high $280. Ryanair / EasyJet beat full-service carriers by 60% for short-hop European routes — and yes, the seat is fine for a 2-hour flight.
• Eurail Global Pass (7 days): $348 youth, $418 adult, $498 first-class. Cheaper than buying four individual high-speed legs. Worth it if your itinerary has 4+ train days.
• Japan Rail Pass (7 days): $345 fixed. Worth it if you do 2+ shinkansen segments. Buy before you arrive in Japan — it's cheaper from outside the country.

The three rules of the booking window

1. The bottom of the band is at T-90 days for international. Wait for the fare to settle into a stable 90-day band, then book within 7 days of the band's floor. Don't second-guess for a $40 swing.
2. Domestic is a 6-week game. The fare floor on a coast-to-coast US ticket is 6–8 weeks out. Inside 21 days the price climbs steeply. Inside 7 days you're paying tax on indecision.
3. Trains reward early booking only when fares are dynamic. Eurostar, TGV, Frecciarossa, ICE — book at 60–90 days out. Regional and commuter trains: walk up. The Tuscany slow-train doesn't change price 6 weeks out vs same-day.

For the full booking method — flights, accommodation, ground transport, insurance, timing — see the Book chapter. For destination-specific itineraries that include the fare math: How to Travel Japan on a Budget. 11 min read.

Chapter III — On the Ground. What a day actually costs.

Daily spend by destination tier. Budget, mid, high. Not aspirational numbers — the floors and ceilings reported by people who actually went and kept receipts. The point of the per-diem is one number per category per day, then multiply by trip length, then add 10% for the days you choose to upgrade. Per-diem doesn't mean austere — it means honest.

Budget tier — $45 to $85 per day

Hostels with a private room or guesthouses, two meals out, one street food, public transit, one paid attraction every other day. This tier works in Hanoi, Bangkok, Kraków, Mexico City, Lima, and most of Eastern Europe and Southeast Asia. The breakdown: bed $18–$32, food $15–$28, transit $3–$8, activities $9–$17.

The discipline at this tier is not skipping the things you came for. A budget that prevents you from doing the one bucket-list dinner is a bad budget. A budget that lets you skip the second mediocre dinner so you can afford the one great one is a good budget. Spend the money on the moments, not the calories.

Mid tier — $120 to $220 per day

3-star hotel or rental, three meals out (one good one), Uber when needed, a paid attraction or museum daily, two coffees. This tier works in Lisbon, Tokyo, Berlin, Buenos Aires, Athens, most of Latin America's capital cities, and second-tier Western European cities. The breakdown: bed $70–$120, food $35–$60, transit $8–$18, activities $10–$24.

Mid tier is where most travel decisions actually live. The leverage at this tier is the single nice meal — a $60 dinner two nights into the trip beats four $15 meals you'll forget by the time you land. Plan it on day three when you've got your bearings, book it the same morning, dress slightly better than you feel.

High tier — $280 to $520 per day

4-star+ hotel or design rental, every meal out, taxis everywhere, museum-pass days, the wine pairing instead of the glass. This tier works in Reykjavík, Zürich, Paris peak season, Sydney, Singapore, and the Scandinavian capitals. The breakdown: bed $180–$340, food $70–$120, transit $15–$30, activities $20–$40.

High tier requires an honest accounting question: what is the marginal $200 buying you that the mid-tier $200 didn't? If the answer is "the view," and the view matters to you, it's worth it. If the answer is "the room is bigger," but you'll be in it for 7 hours of sleep, it's not. The high-tier upgrade is a willingness-to-pay test. Pass when you mean it.

How to mix tiers within one trip

Most well-budgeted trips mix tiers. Two nights of high-tier in the city you flew across the world for, then mid-tier for the rest. Eight days of budget tier through Vietnam, then three nights of mid-tier in Hoi An. The point is to spend the upgrade money where it will be remembered, not as a default. Read more: On the Ground — the local survival guide.

Chapter IV — The Hidden Costs. The line items nobody warned you about.

Visa fees, travel insurance, tipping culture, departure taxes, eSIMs, baggage. The 8% of the budget that wrecks the budget when you forget it's there. A $4,000 trip that's $320 over budget feels like failure. The same trip $320 over budget because you remembered the visa, the eSIM, and the baggage in advance feels like a win. Knowing the line items is half the work.

Visa & entry fees — $0 to $185

Some are free (most of Europe for US passports), some are $185 (Brazil eVisa, India eVisa). Always check 90 days out — visa rules change quietly, and stranding stories are 80% visa stories. The eVisa systems for India, Brazil, Vietnam, and Cambodia all take 3–7 business days; don't apply at T-2 weeks. For destinations that require an in-person consulate appointment (Russia, China, parts of West Africa), allow 4–6 weeks. Read more: Visas & Docs — the entry-paperwork desk.

Travel insurance — 5 to 10 percent of trip cost

Standard tier $30–$80 covers cancellation. Add medical & evacuation ($50–$120) for international — evacuation alone runs $25k–$100k if something goes wrong. CFAR (Cancel For Any Reason) is $100–$200 and lets you cancel for any reason and recover ~75% of prepaid costs, but it must be purchased within 14–21 days of first booking. The math: 5–10% of trip cost in premium, 100x that in coverage. Not optional internationally. Skip on US-only domestic trips under $5k unless your credit card doesn't cover trip interruption.

Tipping culture — 5 to 22 percent depending on country

US: 18–22% restaurant, 15–20% taxi, $1–$2 per drink at a bar. Europe: 5–10% if no service charge included; check the bill. Japan: do not tip — it can be insulting. SE Asia: round up at restaurants, hand a small bill at hotels. Mexico: 10–15% restaurant. The cultural mistake costs $40 across a trip — knowing the rule costs nothing. Tipping is the line item that quietly inflates the food budget by 15–22% if you didn't price it in.

Connectivity (eSIM or local SIM) — $8 to $28 for a week

Airalo, Holafly, or buy a local SIM at the airport. $8–$28 for a 7-day data plan beats $10/day roaming on your home carrier. Activate the eSIM before takeoff so you land connected; the airport kiosk markup is 30–50% over Airalo and the line is always longer than you think. For trips longer than 14 days, a local SIM at a phone shop in town beats both — but only if you have a couple of hours to dedicate to set-up.

Baggage fees — $60 to $140 round-trip checked

Basic economy doesn't include checked bags on US carriers. Round-trip checked bag is $60–$140 depending on airline. If you're flying low-cost European carriers (Ryanair, EasyJet, Wizz), the $40 carry-on fee shows up at the gate — pre-pay online to halve it. Don't be the person at the gate counter discovering this for the first time at $80 cash; the line behind you will judge you and the airline will charge you full price.

Departure taxes — $0 to $50 USD cash

Most countries fold the departure tax into the ticket. A few don't — Belize ($40 cash), Costa Rica ($29 if not included), Indonesia (varies by airport). Carry $50 USD cash for exits to be safe. Cards don't always work at counter terminals, and the cash desk in the departure hall is the most expensive cash you'll ever buy. The $50 USD bill in your "exit pocket" pays for itself the first time you actually need it.

Chapter V — Bring It Home. What you spent. What you learned.

Tracking spend in the moment, post-trip reconciliation, the one spreadsheet that pays for itself by the next trip. The receipts you actually save. Five minutes a night for fourteen nights buys you the data that makes the next trip half as expensive to plan. The receipts you keep are the receipts that pay you back.

The daily log — five minutes a night

Open a notes app or a spreadsheet, log the day's amount by category — bed, food, transit, activities, other. That's it. Don't reconcile mid-trip. Don't optimize while you're there. The point is one number per category at the end of the day, so when you reconcile within 14 days of getting home, you actually have the data instead of guessing from credit-card statements that don't carry the categories. The five minutes is non-negotiable; ten minutes is too long, two minutes leaves out the cash spend.

The post-trip reconciliation — within 14 days

Reconcile within two weeks of getting home. Wait longer and the memory fades, the categories blur, the cash withdrawals turn into "I'm not sure what that was." The point of the reconciliation isn't to feel guilty about overspending — it's to update your floors and ceilings for the next trip so the next budget is more accurate. A trip that came in at +8.7% over plan and you know exactly which lines did it is a great budget. A trip you "mostly stuck to" is a guess.

The 14-day Europe reconciliation, sample

1. Flights — planned $1,200, actual $1,180, variance −$20. Booked at T-90 sweet spot. Came in slightly under because the airline ran a fare drop the week of T-78.
2. Accommodation — planned $1,400, actual $1,520, variance +$120. Two nights upgraded to a balcony room. Worth it. The view paid for itself with the morning coffees we drank up there instead of at a cafe.
3. Food — planned $650, actual $840, variance +$190. Three nicer dinners than planned. The food line is the most-blown line on every European trip; price the upgrade in next time.
4. Transport — planned $280, actual $235, variance −$45. Walked more than expected. Lisbon and Porto are walking cities; the metro budget was over-stated.
5. Activities — planned $380, actual $420, variance +$40. Added one day trip to Sintra. Within tolerance — these always come in slightly over.
6. Hidden costs — planned $220, actual $295, variance +$75. Forgot baggage on the return, eSIM upgrade, tips at three restaurants. Hidden costs always come in over; price them at +15% next time.
7. Total — planned $4,130, actual $4,490, variance +$360. 8.7% over plan. Within tolerance (±15%). Solid budget; minor adjustments for next trip.

The variance bands, in plain English

±15% is a solid budget — you knew the numbers, you held the line on most of them, you upgraded where it mattered. ±15–30% is a budget that needs revisiting — one or two lines blew out and you should figure out which. Over ±30% is a guess that became a trip — not necessarily a bad trip, but the budget didn't do its job. Adjust the floors and ceilings for the next plan and try again.

The compounding return

The first reconciliation is annoying. The second one is faster. The third one is where the budget starts to predict itself — you know your food line, you know your transport line, you've built per-diem floors and ceilings for three or four destinations. By the fifth trip, planning the budget takes 20 minutes instead of three hours. The receipts you kept are the receipts that paid you back.

Stop guessing. Start counting.

RoundTrips is the budget workspace we built for ourselves: per-diem floors and ceilings by destination, fare alerts, currency math, the receipt log that reconciles itself. One tab. One trip. One total. The spreadsheet you'd otherwise build, already built — and tied to the booking flow so you don't double-enter anything.

Open RoundTrips · Browse 248 itineraries with full budgets

If you only read four things before spending.

1. How To Travel Japan on a Budget. Budget, 11 min.
2. How To Find Cheap Flights Without Tedious Tab-Hopping. Currency, 8 min.
3. How To Plan a Two Week Trip From Scratch. Itinerary, 10 min.
4. How To Book a Hotel That Isn't a Tourist Trap. Accommodation, 9 min.

The questions, answered.

How much should I budget for a two-week international trip?

Floor: ~$2,500 for SE Asia or Eastern Europe (excl. flight) at the budget tier. Mid: ~$4,500 for Western Europe, Japan, or Australia. High: ~$8,000+ for Iceland, Switzerland, or Scandinavia. Add $700–$1,400 for the international flight on top. The right total is the per-diem of your destination tier × 14 + flight + 10% buffer for hidden costs.

What's the cheapest way to handle currency abroad?

Two-card stack: a 0%-FX credit card for everything you can pay by card (Capital One Venture, Chase Sapphire, Schwab Investor Checking has no ATM fees), and a debit card for ATM withdrawals on the local currency. Skip airport currency kiosks (8–12% spread) and your home bank's currency order desk (3–5% spread). Pull cash from a bank ATM on arrival for under 1%.

Should I use a debit card or credit card abroad?

Credit card at the register, debit card at the ATM. Debit at the register is a fraud risk — if it's stolen, your bank account empties before you notice. Credit is also where the FX-fee waivers and travel insurance live. Use debit only at bank-branded ATMs (not standalone kiosks) for cash, and only as much cash as you'll spend in 4–5 days.

How much cash should I actually carry?

Cash for 4–5 days of cash-only spending — markets, taxis, tips. For most destinations that's $80–$200 USD-equivalent. Carry the rest on cards. Refill at bank ATMs. Keep $50 USD in a separate pocket as emergency-exit cash. Don't carry the whole trip's cash — pickpocket math is brutal.

What's a realistic daily food budget?

Budget tier: $15–$28/day means street food, market lunch, one cheap dinner. Mid tier: $35–$60/day is two sit-downs and a coffee. High tier: $70–$120/day is three sit-downs with one tasting-menu night per week. Western Europe and Japan run high on the food line because casual restaurants are still $20+ per entrée — adjust.

How do I avoid getting destroyed by hidden fees?

Pre-trip: read the airline's baggage policy, buy your eSIM at home, check visa requirements at 90 days out. On arrival: get cash from a bank ATM (not airport kiosk), set up local transit cards (Suica, Octopus, Oyster — all rechargeable). Tipping: research the country's culture before you sit down at the first restaurant. The 8% hidden-cost line item is what makes budgets fail.

Is travel insurance actually worth it?

For international trips: yes, always. Standard tier ($30–$80) covers trip cancellation. Add medical & evacuation ($50–$120) — evacuation alone runs $25k–$100k if something goes wrong. The premium is 5–10% of trip cost; the coverage is 100x that. CFAR is the upgrade that lets you cancel for any reason and recover ~75%, but it must be purchased within 14–21 days of first booking.

How do I track spending without making the trip about spending?

Five minutes a night, before bed. Open a notes app or a spreadsheet, log the day's amount by category — bed, food, transit, activities, other. That's it. Don't reconcile mid-trip. Don't optimize while you're there. The point is one number per category at the end of the day, so when you reconcile within 14 days of getting home, you actually have the data.