How effective are condoms?
Last updated September 3, 2026.
External condoms are about 87% effective with typical use (a 13% yearly failure rate per the CDC) and about 98% effective with perfect use. Internal condoms are lower, at a 21% typical-use failure rate. Most real-world failures trace to use errors: late application, early removal, breakage, oil-based lubricants weakening latex, expired stock, or heat damage from wallets and cars. The fix-list is short: check dates, pinch the tip, water or silicone-based lube only with latex, a fresh condom every time, and hold the base on the way out. Condoms are also the only contraceptive that reduces STI risk, including HIV, which is why the standard advice is pairing: condoms plus a more pregnancy-reliable method like the pill, implant, or IUD covers both jobs at once. Note that natural or lambskin condoms prevent pregnancy but do not block STIs the way latex does. If a condom breaks or slips, emergency contraception can prevent pregnancy for up to 5 days after unprotected sex.
What to do
- Check the wrapper: expiration date, no tears, no heat-damaged storage.
- Use the right lube: water or silicone-based with latex; oil breaks latex down.
- On before contact, off with care: before any genital contact, held at the base during withdrawal.
- Pair for full coverage: condoms handle STIs; add a second method for stronger pregnancy protection.
- Know the backup: emergency contraception works up to 5 days after a break or slip.
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