Can condoms fail without breaking?

Yes. A condom doesn’t have to split to stop working. It can also fail if:

• it slips off during sex, or comes off when you pull out
• semen spills out when you pull out, because the base wasn’t held
• it’s put on after sex has started, or taken off before sex has finished
• it’s put on the wrong way up and then turned over, so the outside has already touched the penis

In each case, semen, vaginal fluid or skin contact can pass between you, which can lead to pregnancy or an STI. The good news is that most of these problems can be prevented.

Taking a condom off during sex without your partner knowing is never OK. This is known as stealthing, and it is a form of sexual assault.

A condom is more likely to slip off if:

• it’s the wrong size: too big and it might slip off, too small and it might tear
• it isn’t rolled all the way down to the base of the penis
• the penis wasn’t fully erect when it was put on
• nobody holds the base of the condom as the penis is pulled out

Condoms come in lots of different sizes, textures and materials, so it’s worth trying a few to find one that fits well. If a condom won’t roll down, it may be on the wrong way round, so throw it away and use a new one.

If you’re switching between anal and vaginal sex, use a new condom, as bacteria from the bottom can cause an infection in the vagina.

Some things weaken a condom, so it’s more likely to leak or split:

• Oil-based products, such as Vaseline, hand cream or oil-based lubricant, can damage latex condoms. Use a water-based or silicone-based lubricant instead.
• Antifungal medicines used on or around the vagina, vulva, penis or anus, such as thrush creams, can damage latex condoms.
• Condoms that are out of date, or that have been kept in a wallet for over a month, may not be safe to use.
• Opening the wrapper with scissors or anything sharp, including your teeth, can tear the condom.
• Using two condoms at once, or an internal condom with an external one, can make one or both split.

Only use condoms with a CE or UKCA mark on the packet, and use a new condom every time you have sex. Read more in “Why you should never re-use a condom”

Condoms are up to 98% effective at preventing pregnancy if you use them correctly every time you have sex. If they’re not used correctly, they’re around 82% effective, which means around 1 in 5 women who use condoms for a year will get pregnant.

Internal condoms, worn inside the vagina or anus, are up to 95% effective when used correctly, and around 79% effective when they’re not.

The difference comes from mistakes, such as putting a condom on late or not using one every time. Using a condom every time you have sex is still the best way to protect you and your partner from HIV and other STIs.

If you notice that a condom has slipped off, leaked or split, stop and take it off carefully. If it has come off inside the vagina or anus and you can’t remove it, see a doctor or nurse. Then:

• Think about emergency contraception if pregnancy is possible. The copper coil (IUD) can be fitted up to 5 days after sex and is the most effective type. The emergency pill needs to be taken within 3 days (levonorgestrel) or 5 days (ulipristal acetate), and it works better the sooner you take it. You can get it from most pharmacies.
• If you think you may have been exposed to HIV, get urgent medical care straight away and ask about PEP (post-exposure prophylaxis), a medicine that can stop you getting HIV. It has to be started within 72 hours, and the sooner you start it, the better.
• Talk to your partner, so you can both get tested.

Read more in “My condom broke. What should I do now? First steps and when to test”

Most condom failures can be prevented by using condoms the right way every time:

• Check the packet for damage, the expiry date and a CE or UKCA mark.
• Open the wrapper carefully with your fingers.
• Put the condom on before there’s any contact between the penis and your partner’s genitals, mouth or anus.
• Make sure the penis is fully erect, hold the tip of the condom to squeeze out any air, and roll it all the way down to the base.
• Use a water-based or silicone-based lubricant if you need one.
• Hold the base of the condom as the penis is pulled out, then throw the condom away.

Remember that condoms don’t cover all the skin around the genitals. So even when a condom works perfectly, it can’t fully protect you from STIs that spread through skin contact, such as Herpes, HPV and Syphilis. Read more in “3 STIs you can catch even if you use a condom”

A condom that slips off or leaks can expose you to STIs in the same way as sex without a condom. If it happens with a new partner, or someone whose STI status you don’t know, get tested. Some infections need time to show up on a test:

• Chlamydia and Gonorrhoea: from about 2 weeks after sex.
• HIV: a fourth-generation lab blood test is reliable from 45 days after sex, and a rapid test that gives an instant result from 90 days.
• Syphilis: a test in the first 3 months after sex can miss it, so you may need a repeat test.

Get tested straight away if you notice symptoms, such as unusual discharge, pain when you pee, or sores or blisters around your genitals.

Better2Know offers:

• Full Screen: tests for Chlamydia, Gonorrhoea, Hepatitis B, HIV, Mycoplasma, Syphilis and Ureaplasma, from 28 days after sex, with results in 3 days (5 days for the home test). You can book it at one of our clinics or order a Full Screen home test.
• Early Platinum Screen: tests for 12 infections, including Chlamydia, Gonorrhoea, HIV and Syphilis, from 14 days after sex, with results in 3 days. Some infections, such as HIV and Syphilis, can be missed this early, so if your results are negative you’ll need follow-up tests.
• Early Detection Screen: tests for HIV, Hepatitis B and Hepatitis C from 10 days after sex, with results in 3 days. A negative HIV result at this stage needs a follow-up test at 45 days.

Not sure which test you need? Our Patient Care Team is available 24/7 on 020 7099 0955.

Can you get pregnant if a condom slips off?

Yes. If a condom slips off or leaks during vaginal sex, there is a chance of pregnancy. If you don’t want to get pregnant, get emergency contraception as soon as possible.

Is it safer to use two condoms?

No. Using two condoms at once, or an internal condom with an external one, can make one or both split. Use one condom that fits well, with a water-based or silicone-based lubricant.

Do condoms come in different sizes?

Yes. Condoms come in lots of different sizes, textures and materials. A condom that’s too big might slip off, and one that’s too small might tear, so try a few to find one that fits.

How soon should I get tested after a condom fails?

Tests for Chlamydia and Gonorrhoea can pick up an infection from about 2 weeks after sex. A lab HIV test is reliable from 45 days, and a Syphilis test in the first 3 months can miss the infection. Get tested straight away if you notice symptoms.

Condoms can fail without breaking, most often because they slip off, spill when the penis is pulled out, or aren’t on for the whole time. Choosing the right size, using the right lubricant and holding the base when you pull out all help.

If a condom fails, think about emergency contraception and PEP straight away, then get tested. Book a Full Screen at a clinic near you or order a home test kit. Our Patient Care Team is available 24/7 on 020 7099 0955.

Not in the UK? Choose your country from the selector at the top of the page for local tests and prices.

This article originally appeared on 29 December 2023 and was last updated on 30 September 2026.

Medical review. This article was medically reviewed by Dr Steve Chapman, Doctor with a wealth of clinical experience in the field of STIs, on 2 October 2025. It is general information and not a substitute for personal medical advice.

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