Right now a bond is $9.99 in real money or about 12.0M gold on the Grand Exchange — pay with whichever you have more of.
Both buy the exact same 14 days. The only question is which currency is cheaper for you. Here's the veteran answer, not a table dump.
If you can make 12M gold in less time than it takes you to earn $9.99, gold is the cheaper currency. Gold-rich mains and money-making grinders should almost always redeem a bond instead of paying cash.
If 12M gold is a real grind for you — early game, or an account short on gp — the flat $9.99 is simpler and keeps your gold for gear. Ironmen can't trade for bonds anyway, so cash is their only route.
The bond values your gold at about $0.83 per million. So the line is simple: pay with gold whenever your gold-per-hour, in dollars, beats what you'd earn working for $9.99. Above that rate, gold; below it, cash.
And the rate is moving in gold-holders' favour — a year ago a bond cost ~15.4M, valuing gold near $0.65/M; today it's ~12.0M, or $0.83/M. Old School gold is worth about 28% more in dollars than it was a year ago.
Jagex sets only the cash price. The gold price is set entirely by players: every tradeable bond was bought with real money by someone who then sold it on the Grand Exchange for gold. So the gold price is a live vote on one question — how much gold is 14 days of membership worth?
When lots of players buy bonds with cash and dump them for gold, supply rises and the price falls; when more players want membership-for-gold than there are bonds, it climbs. That's why this page reads the price live from the GE feed instead of quoting a number typed in once and left to go stale.
A bond costs $9.99 in real money from Jagex (£7.49 / 8.99€), or about 12.0 million gold on the Grand Exchange. Either way, one bond gives you 14 days of membership.
Right now a bond trades for roughly 12.0M gold — instant-buy around 12.20M, instant-sell around 11.83M. The gold price floats with supply and demand, so it changes daily. The figure at the top of this page is pulled live from the OSRS Wiki price feed.
It depends on how fast you earn gold. A bond is 14 days of membership for either $9.99 or ~12.0M gold.
The bond values your gold at about $0.83 per million. If you can make 12M gold in less time than it takes to earn $9.99, paying with a bond is the better deal. If gold is scarce for you, cash is simpler.
Over the past year the gold price fell from about 15.4M a year ago to around 12M today — more than 20%. That means each million gold now buys more membership than it did, and is worth more in real money (about $0.83/M today versus $0.65/M a year ago). The move is set entirely by player supply and demand on the Grand Exchange.
Both buy the same 14 days. Cash is a flat $9.99. Paying with gold costs ~12.0M, which the bond treats as worth about $9.99 too (the $0.83-per-million rate). So pay with whichever you have more of — gold if you earn it fast, cash if your time is scarce.