Switzerland is expensive — that's unavoidable — but Interlaken specifically offers good opportunities to save if you plan smart. Here's a practical strategy.

1. Buy a Half Fare Card if your trip runs longer than a week. The half-fare card costs about CHF 190 a year and roughly halves the price of every train, bus, and boat ticket, including part of the Jungfraujoch fare. If your trip involves several transfers, it pays for itself within a few days.

2. Have one restaurant meal a day, and picnic for the rest. Tourist-area restaurant prices are steep (CHF 30 and up per plate), while supermarkets like Coop and Migros offer ready-made sandwiches for CHF 6–9 and full picnic meals for around CHF 12. Mixing one restaurant meal with two picnic meals a day cuts food costs by up to 40%.

3. Enjoy the free views first. Höhematte meadow for watching paragliders land, strolling the shores of Lake Thun and Lake Brienz, and walking trails around town are all completely free, offering an authentic Swiss experience at no cost.

4. Book Jungfraujoch smartly. The early "Good Morning" ticket offers up to a 20% discount compared to the standard fare, and Swiss Travel Pass holders get 25% off. If your budget is very tight, Harder Kulm alone (just CHF 44) offers a stunning panoramic view for a fraction of Jungfraujoch's cost.

5. Favor the shoulder season. Late spring (May) and early autumn (October) offer noticeably lower accommodation prices than peak summer, with weather still decent for most activities.

6. Avoid withdrawing cash at hotels or tourist exchange counters. Their exchange rates are far less competitive than bank cards or ATMs run by major Swiss banks.

7. Watch the franc-to-riyal rate. Since 1 CHF is worth roughly SAR 4.6 and this rate shifts constantly, check the actual exchange rate right before your trip to budget more accurately.

With these tips combined, a family or group of friends can meaningfully cut the overall cost of an Interlaken trip without giving up the core mountain experiences everyone comes for.