MUNBYN is currently showing the $20 off voucher at the top of this page, which takes $20 off orders over $189 and is best for mid sized business purchases that already reach that $189 threshold. That voucher is the lead promo code you should try first at checkout. There are also percentage codes and several active sales that can save more on larger or clearance purchases.
If your order is under $79: factor in shipping. Free shipping applies only on orders over $79, so on a $60 purchase the 8% off code is the sensible choice because it works sitewide. For example, on a $60 order the 8% off code saves $4.80, leaving $55.20, while the $8 off $119 and $20 off $189 codes do not apply.
If your order is $79 to $118.99: free shipping is available once you reach $79. Use the 8% off code for general items; it always applies sitewide. On a $100 order, the 8% code saves $8, leaving $92. The $8 off $119 and $20 off $189 still do not apply.
If your order is $119 to $188.99: the $8 off voucher for orders over $119 becomes available. Compare it to 8% off. For a $140 order, the $8 off voucher reduces the total to $132, while 8% off saves $11.20 and leaves $128.80, so the 8% code is better at $140. Try both at checkout if unsure.
If your order is $189 to about $250: the $20 off voucher over $189 applies and must be compared with 8% off. On a $200 order, the $20 voucher gives a final price of $180, while 8% off saves $16 and leaves $184, so the $20 voucher saves more. Use the $20 off voucher at the top of this page for these mid range baskets.
If your order is well over $250: percentage discounts become more attractive. For a $400 order, 8% off saves $32 and leaves $368, while the $20 voucher leaves $380, so the 8% code is the better choice on larger carts. For very large or single item buys check whether a clearance or Prime Day style sale applies to that item, because a sale percent can beat both codes.
When you are buying clearance or marked sale items: use the sale that applies to those items. A clearance coupon for 20% off selected products or a sale offering up to 67% off selected money counters will usually save more than a sitewide 8% code or the fixed $20 off, but only on items included in the sale. For example, a $300 printer marked 20% off costs $240 after the sale price, saving $60; the 8% code on the same $300 original price would save $24, leaving $276, so the clearance price is the better deal for that item.
Free shipping and item type notes: free shipping on orders over $79 can be decisive for small carts that would otherwise pay to ship. The fixed dollar codes require the stated minimum spends ($119 and $189) and are website only. Percentage codes and sale prices apply where the terms say they do; sale discounts are limited to selected products.
Our records put the typical percentage code at 8% in the 12 months to October 2026, and the biggest percentage code we saw in that period was 20% off. In the 12 months to October 2026 our team tested 67 MUNBYN codes at checkout across 51 offers. Use the $20 off voucher above when your cart is just over $189; for higher totals try the 8% off code or pick the sale price when your item is explicitly on clearance.
To choose between the options that apply to your basket, calculate the final total under each eligible offer and take whichever leaves the lower final price. If a sale price applies to the specific item you are buying, that sale price usually beats a sitewide percentage or fixed amount; otherwise try the $20 off voucher at checkout for orders above $189 and the 8% off code for larger totals.