Guides
On this page
  1. The difference at a glance
  2. Prefunding is different from the final debit
  3. An offset can leave a loss to pay
  4. Keep the credit limit and custody questions separate
  5. What to check before a trade
  6. Frequently asked questions
  7. Explore HypaForecast markets
  8. Sources and scope
  9. Related guides

Cash upfront vs contra in Singapore: when do you need cash?

Cash upfront and contra change when you need to provide money for a share purchase. DBS Vickers' Cash Upfront requires prefunding. Tiger Brokers Singapore's Cash Boost offers purchases against an approved credit limit and allows contra settlement. Neither arrangement removes your responsibility to pay what you owe.

The examples below explain the mechanics, not which account to choose. Each broker's rules apply to its own service and the market you trade.

The difference at a glance

QuestionDBS Vickers Cash UpfrontTiger Cash Boost contra example
What is needed before buying?Cash provided before the buy orderAn approved credit limit
How is it settled?For a trade linked to a Multi-Currency Account (MCA), reserved cash is debited at settlementA corresponding sale offsets the purchase; the difference is settled
What still needs checking?Sufficient cash in the traded currency, including chargesAny outstanding purchase or contra loss requiring payment

See the DBS Vickers Cash Upfront explanation. The contra example follows Tiger's Cash Boost FAQ.

Prefunding is different from the final debit

DBS Vickers says Cash Upfront applies to buy trades only. For an MCA-linked purchase, it reserves the trade value plus charges on the trade date, then debits the money on the settlement date. The traded currency must already be available before you place the trade.

So “the money has not been debited yet” does not mean it is free to use elsewhere. Prefunding, reserving money and completing settlement are separate stages. DBS Vickers

An offset can leave a loss to pay

With Tiger, a completed corresponding sale can offset the purchase through contra settlement. If it produces a loss, you must pay that loss. If the purchase remains outstanding, you need to fund and settle it. Unpaid obligations can lead to interest, forced selling or restrictions under Tiger's terms. Tiger Cash Boost FAQ

Consider a hypothetical purchase of 100 shares at S$5 each, costing S$500 before charges. Assume an eligible sale of all 100 shares is completed in time for an offset, with both trades in Singapore dollars:

  • Sell at S$5.20: S$520 − S$500 = S$20 gross gain.
  • Sell at S$4.80: S$480 − S$500 = −S$20, a gross loss of S$20.

The calculation excludes commissions, exchange charges, taxes, interest and currency-conversion costs. With prefunding, you would first need the S$500 purchase amount plus applicable charges; the later price movement can still produce a gain or loss.

Do not budget around a guaranteed exit. A sell limit order may remain unfilled if its price condition is not met. Submitting an order is not the same as completing the sale needed for an offset. Investor.gov's explanation of order types

Keep the credit limit and custody questions separate

A trading limit sets how much you can buy; a margin loan is money borrowed to fund a purchase, with securities as collateral. The limit alone does not tell you the loan terms. Investor.gov on margin accounts

Tiger treats Cash Boost and its margin account as separate account types. Do not assume a Cash Boost limit has margin-account terms. Losses can exceed your account balance. Tiger Cash Boost FAQ

Funding also differs from custody. Tiger holds purchased Singapore shares through its CDP nominee account, not your individual CDP account. Tiger's custody explanation

What to check before a trade

Read the terms for the exact account, security and market, then answer these questions:

  • What amount must be available, in which currency, and by what deadline?
  • Will the intended sale qualify for an offset, and what happens if it does not fill?
  • What fees, interest or other charges could remain payable?
  • What is the payment plan if the sale loses money or you keep the shares?

Do not substitute another broker's settlement calendar or grace period for your own. If the account documents are unclear, obtain clarification before relying on a deadline.

Frequently asked questions

Does cash upfront mean I cannot lose money?

No. Paying before the purchase does not stop the share price from falling. The hypothetical loss above is the same price loss whether you prefunded or used an eligible offset.

Does contra mean I only need enough cash for a small loss?

No. The loss may be larger than expected, and an offset depends on a completed eligible sale. An unfilled order does not cancel the purchase obligation.

Is cash upfront versus contra the same as CDP versus custody?

No. The first comparison concerns funding and settlement. The second concerns how the shares are held. Check both separately.

Explore HypaForecast markets

For prediction markets, browse HypaForecast or follow the links below to view current questions and round details. These links are separate from the stock-broker services discussed here.

Sources and scope

Provider pages checked on 24 October 2026. No universal fee schedule, payment deadline or eligibility rule is implied.