Let's suppose you participated in this auction (recently concluded) and purchased $1,000 (face value) of N522100N, a new issue 5 year Singapore Government Security. Here's what actually happens:
1. $1,000 is deducted from your account when you place the order, before the deadline (and before the auction).
2. $2.08 is refunded to your account within a couple days after the auction. That's because the cut-off price was $997.92. In other words, you receive an immediate discount off this bond's face value. The discount is factored into the annualized yield computation (2.92%). (See below.)
3. You receive coupons of about $14.38 every 6 months. For a 5 year bond there are 10 of these coupon payments. It's "about" due to rounding and occasional differences in when business days fall. But the total coupon payments for all 5 years will surely equal $143.75 — $28.75 * 5.
4. When the bond matures (at the end of 5 years) you receive the face value ($1,000) — $2.08 more than you paid for the bond at initial auction. That extra $2.08 (as mentioned) raises the annualized yield to 2.92%.
Bonds are routinely quoted in $100 increments, so that's what the cut-off price means ($99.792). In fact this particular bond is only available in $1,000 increments, so you'd multiply this cut-off price by 10 to get the price of a $1,000 bond in the initial auction. That's how we know the bond was $997.92 to buy and that $2.08 was refunded. (Per $1,000 increment; $1,000 is the minimum.)