Paper House currently has a 25% off all purchase promo code at the top of the page, and that 25% off voucher is the clear go to if most of what you are buying is full price. The voucher is website only and redeemed with a checkout code, so it suits you if you shop online and want a straightforward percentage off every item in your cart.
Small orders under $50. For a small cart of mostly full price items, use the 25% off voucher. On a $40 order, for example, the code takes 25% off leaving $30, so you save $10. The 20% and 15% codes save less on the same full price basket.
Mid size orders $50 to $200. The 25% off voucher still usually wins. On a $120 order, for example, the code takes 25% off leaving $90, so you save $30. If you applied a 20% code instead you would pay $96 and save $24, so the 25% voucher saves $6 more on that basket.
Large orders over $200. The 25% voucher gives the biggest flat percent off all full price merchandise here as well. If you plan to stock up on full price planners, notebooks or gift sets the 25% code reduces the total more than the 20% or 15% codes on the same items.
Buying sale items. Sales products are reduced by up to 60% already and that can beat the 25% coupon for those items. The sales offer is valid only on marked sale products; it reduces the listed sale price by its markdown. If most of your cart is in the sale, the sale reductions will usually produce the lower total than taking 25% off the pre sale price. The voucher terms do not state whether codes apply to sale items, so assume the sale price is the safe comparison.
First time newsletter signup. The newsletter signup is available but is a signup only offer. Use newsletter signup if you want email offers and first time subscriber promotions; it is not the page lead and does not replace the 25% voucher for immediate checkout savings.
When multiple codes are shown. The 25% off voucher at the top of the page is your default for full price purchases because it takes a larger percentage off than the 20% and 15% checkout codes. Use the 20% or 15% only if the 25% code does not apply to the items you have selected.
To choose, compare the final totals, taking the 25% voucher first for full price items and relying on the sale markdowns for items already reduced. Take whichever option leaves you the lower total. There is no stated rule on combining the codes and the sale terms only say the reductions apply to sale products, so do not assume codes stack unless the checkout shows they do.