Start with the wagering base, not the match percentage
The headline match percentage is the least useful number in a bonus offer. What matters is whether the playthrough applies to the bonus alone or to the deposit plus bonus. A 40x requirement on a £20 bonus means £800 of wagering; the same 40x on a £20 deposit plus £20 bonus means £1,600. Before opting in, confirm the base in the terms. If the wording is ambiguous, treat the larger figure as the real cost.
A simple test separates a workable offer from a decorative one. Divide the required wagering by the number of days before expiry, then compare that daily figure with your normal bet size and session length. If the maths demands more play than you would normally do, the bonus is changing your behaviour rather than rewarding it. The takeaway is blunt: a bonus you chase is not a bonus.
Check game weighting before you choose a slot
Game weighting changes the effective playthrough. Slots often count 100% toward wagering, while table games may count 10% or less, and some live-casino games may be excluded entirely. A £10 bet on a game weighted at 10% contributes only £1 to the requirement. That difference turns a 30x target into a much longer grind. Check the weighted-contribution table before you spin, not after.
If the terms list a long exclusion table, read it as a map of where the bonus is not designed to be used. Pick an eligible slot with a permitted bet size and a volatility level you would play without the bonus. The point is not to find the highest theoretical return; it is to avoid a game that silently contributes almost nothing.
Read the max-bet and expiry rules together
A maximum bet rule is usually a hard stop. If the cap is £5 and you place a £6 spin while a bonus is active, the operator may void the bonus and any winnings tied to it. Expiry rules create a second trap: a 7-day window sounds generous until the playthrough is divided across the week. Calculate the required daily turnover before you accept. If the number is unrealistic, decline the offer or ask support whether a lower-value bonus is available.
The safe routine is to check both rules in the same pass. A bonus with a low max bet and a short expiry is not necessarily bad, but it is restrictive. It suits a player who already bets small and plays frequently; it suits almost no one who plans one long weekend session and then stops.
Confirm cashout caps and payment exclusions
Cashout caps and payment-method exclusions decide whether winnings leave the account in practice. Some bonuses cap the maximum convertible amount, and some deposit methods—often e-wallets—do not qualify for the offer. Before depositing, open the cashier and confirm that your chosen method is eligible and that the cap is stated in the bonus terms. The public pages for spinpolo casino should match the cashier, but the cashier is the final record. If the two conflict, keep a screenshot and ask support to confirm in writing before you play further.