Wait vs Buy Pricing Planner

First, it estimates your expected price if you wait: expected wait price = current price − expected price drop. Then it discounts the savings by sellout risk: sellout-adjusted expected savings = (current price − expected wait price) × (1 − sellout risk). Finally, it applies an urgency penalty based on your urgency score to reflect that waiting has a real downside when you need the item soon.

This tool works best when you can make a reasonable single-point guess for the likely discount (or at least a forecast you’re confident enough in). It doesn’t model multiple future promotions, price-matching, taxes/shipping, or restocks—so if those matter, the recommendation should be treated as a directional guide. For items with clear restock patterns or coupons that frequently stack, the “sellout risk” input should be higher confidence than a guess.

If expected price drop is 0, waiting will only make sense when sellout risk is low and urgency is also low. If sellout risk is near 100%, the calculator will tend to recommend “Buy now” even for moderate discounts, because you’re unlikely to get the chance to benefit from the lower price. If urgency is at the top end (e.g., 10), waiting needs a meaningfully larger expected discount to overcome the urgency penalty.

Avoid entering an “expected price drop” larger than the current price—those inputs are invalid and will distort outcomes. Be careful with percentage vs currency: a 10% drop is not the same as $10 off unless you confirm the mapping. Also remember that the calculator is not an optimization for opportunity cost (like interest on your cash) or for changes in personal needs over time—those can justify “Buy now” even when the tool leans toward waiting.