How long someone lives after their kidneys fail depends far more on the path chosen than on the kidneys themselves. Without the filtering that kidneys or a machine provide, the body can’t clear potassium, fluid and waste, so life with no treatment at all is measured in days. Choosing not to start dialysis is a different situation from stopping it, though, and many people who never start live for months or years with good supportive care.1PubMed Central. Conservative Management of End-Stage Renal Disease without Dialysis: A Systematic Review For some older, frail people, dialysis may add little or no time compared with care without it, which makes the choice less obvious than it sounds.2PubMed Central. Survival of Older Patients With Advanced CKD Managed Without Dialysis: A Narrative Review
How Long Life Lasts After Stopping Dialysis
After the last dialysis session, half of people die within about 4 to 6 days, and that holds for both home (peritoneal) and center (hemo) dialysis.3PubMed Central. Prognostication After Dialysis Withdrawal Among people who entered hospice after stopping dialysis, average survival was about 7 days, and none lived beyond 40 days.4PubMed Central. Survival after Dialysis Discontinuation and Hospice Enrollment for ESRD That is far shorter than other hospice patients, who averaged about 54 days.5PubMed Central. Survival after Dialysis Discontinuation and Hospice Enrollment for ESRD
Some things shift the time a little. People who still pass some urine when they stop tend to live longer, because their kidneys still do a bit of filtering.6PubMed Central. Prognostication After Dialysis Withdrawal People who stop for emotional or life-circumstance reasons, rather than because of a medical crisis, also tend to live longer.7PubMed Central. Prognostication After Dialysis Withdrawal Being male, being referred to hospice from a hospital, being very weak, and having swollen legs or ankles all point to a shorter time.8PubMed Central. Survival after Dialysis Discontinuation and Hospice Enrollment for ESRD
Two people who stop on the same day can differ by days, depending on how much urine they still make, how much fluid they carry, and how sick they were beforehand. Doctors can’t give an exact date, but the care team can say when changes such as deeper sleepiness suggest death is within days.
In the days after the last session, fluid and waste build up gradually, so many people become drowsy and sleep more. Confusion and less awareness often come before death. Hospice can begin right away to manage breathlessness and restlessness, and it is common to have time for goodbyes in the first days.
Stopping usually means simply not going to the next scheduled session. For peritoneal dialysis, it means ceasing the daily exchanges at home. Many people plan the last session in advance, tell relatives, and arrange for family to be present. The decision can be revisited until the person actually stops. Someone who changes their mind soon after missing a session can often restart, but each missed day makes that harder and the person weaker, so reconsidering is best done early.
Living Without Dialysis by Choice
This path means treating symptoms, diet and complications without dialysis.9PubMed Central. Conservative Management of End-Stage Renal Disease without Dialysis: A Systematic Review In one review, half of patients lived longer than somewhere between about 6 and 23 months, depending on the group.10PubMed Central. Conservative Management of End-Stage Renal Disease without Dialysis: A Systematic Review Across all groups the typical survival ranged from 1 month to about 3.5 years, and 29% to 82% were still alive after a year.11PubMed Central. Survival of Older Patients With Advanced CKD Managed Without Dialysis: A Narrative Review
The spread is so wide partly because people choosing this path are often older or already very sick. It also depends on how much kidney function is left at the start. Your report may list “eGFR,” a kidney filtering score, and these patients started at about 7 to 19.12JAMA Network Open. Long-term Outcomes Among Patients With Advanced Kidney Disease Who Forgo Maintenance Dialysis: A Systematic Review Someone near 7 has much less time than someone near 19, and the person’s overall health matters more than the kidney numbers alone.
Supportive care is steady, practical work. The team regularly checks blood potassium and fluid, prescribes medicines for itching, nausea and poor sleep, and uses water pills and diet changes to limit swelling. It also includes planning ahead with palliative care about where the person wants to be at the end.
Quality of life often holds up. For many people on this path, mood improved and daily physical well-being stayed stable for about 8 to 24 months, declining mainly near the end.13JAMA Network Open. Long-term Outcomes Among Patients With Advanced Kidney Disease Who Forgo Maintenance Dialysis: A Systematic Review
People on this path usually keep seeing a kidney team, who watch symptoms and blood results so changes are noticed early rather than only in a crisis. A sudden drop in energy, appetite or urine output can signal a shift toward the final weeks, and it is a cue to bring palliative and hospice support closer. The path is not irreversible: someone who feels worse than expected, or whose goals change, can still ask to start dialysis.
A low-protein diet can help some people. Among older people without diabetes, a carefully supplemented very low-protein diet safely delayed dialysis, with one-year survival as good as starting dialysis: about 87% versus 84%.14PubMed. Efficacy and safety of a very-low-protein diet when postponing dialysis in the elderly: a prospective randomized multicenter controlled study People who stuck to a low-protein diet with dietitian support lost kidney function about a third as fast as those who didn’t.15PubMed Central. Low protein diet with personalized support in advanced chronic kidney disease: association with disease progression, dialysis delay and mortality Ask the kidney team about a supervised plan rather than cutting protein on your own.
How Long People Live on Dialysis
Dialysis uses a machine (hemodialysis) or the lining of the belly (peritoneal dialysis) to remove waste and fluid the kidneys can no longer clear. In one large study, typical survival on either type was about 3 years, around 38 months for hemodialysis and 37 for peritoneal.16PubMed. Similar outcomes with hemodialysis and peritoneal dialysis in patients with end-stage renal disease Yet in a national group matched for health, average life expectancy was about 19 years on either type.17PubMed Central. Cost-effectiveness of hemodialysis and peritoneal dialysis: A national cohort study with 14 years follow-up and matched for comorbidities and propensity score
The two figures differ because the first includes many older and sicker people who start dialysis, while the second follows people matched for health. Age and other illnesses at the start shape the outlook more than dialysis itself. An estimate from the kidney team that accounts for age, other illnesses and general health is more useful than a national average.
The type matters less than people think. More recent long-term data show no real survival difference between the two types over 5 years.18PubMed. Similar outcomes with hemodialysis and peritoneal dialysis in patients with end-stage renal disease One study did find peritoneal dialysis linked to about half the risk of death in the first 2 years.19PubMed Central. Comparing Mortality of Peritoneal and Hemodialysis Patients in the First 2 Years of Dialysis Therapy: A Marginal Structural Model Analysis Since survival is broadly similar, choose the type that fits your daily life.
Hemodialysis usually means three sessions a week of about four hours at a center, which ties the person to a fixed schedule and travel. Peritoneal dialysis is done daily at home, often overnight, and may suit people who still work or live far from a center. It needs space at home and careful hygiene, and it carries a risk of infection in the belly, which is why training in clean technique is part of starting it. Some people can’t use one type for medical reasons, such as past abdominal surgery, and people can switch later if one stops working well or no longer suits them.
Heart disease is the biggest threat for people on dialysis. Diabetes and older age at the start lower survival, while staying active and attending every session helps.
How Much Time a Kidney Transplant Adds
A transplant can free a person from dialysis, and recipients generally live longer than people on dialysis. A kidney from a living donor roughly halves the long-term risk of death compared with a deceased-donor kidney.20PubMed Central. Life expectancy after kidney transplantation in a population-based retrospective cohort Living-donor kidneys also failed about 6% less often within 5 years.21PubMed Central. Comparison of outcomes after living and deceased donor kidney transplantation: UK national cohort study Even in older recipients, deceased-donor kidneys were two to three times as likely to fail as living-donor ones.22PubMed Central. Benefits of Living Over Deceased Donor Kidney Transplantation in Elderly Recipients. A Propensity Score Matched Analysis of a Large European Registry Cohort
A living-donor kidney can be transplanted on a planned date, so it spends less time out of the body. Planning also lets the recipient receive it before or soon after starting dialysis, and less time on dialysis is linked to better outcomes. The donor is carefully screened and healthy, which helps the kidney work well from the start.
To move toward a transplant, ask for a referral early, ideally before dialysis starts. A relative or friend can be tested as a living donor, which matters because waiting for a deceased-donor kidney often takes years. Recipients take anti-rejection medicines for life.
Not everyone can have a transplant. Teams evaluate heart health, infections, cancer history and general fitness, because surgery and anti-rejection medicines are hard on very ill people. Age alone is not a cutoff, and many older people are transplanted, but frailty or serious illness can rule it out. A person turned down at one center can sometimes ask whether another would evaluate them differently.
When Kidneys Fail Suddenly in the Hospital
Among ICU patients whose kidneys failed suddenly and needed dialysis, about 6 in 10 died before leaving hospital.23PubMed Central. Long-term outcome in ICU patients with acute kidney injury treated with renal replacement therapy: a prospective cohort study These patients are usually fighting another severe illness, such as infection or surgery complications. About 7 in 10 had died by 3 years.24PubMed Central. Long-term outcome in ICU patients with acute kidney injury treated with renal replacement therapy: a prospective cohort study
Survivors often recover. About half of survivors had full kidney recovery at a year, and another third partly recovered.25PubMed Central. Long-term outcome in ICU patients with acute kidney injury treated with renal replacement therapy: a prospective cohort study Recovery peaked at around 3 months, and about 1 in 5 still needed permanent dialysis at a year.26PubMed Central. Long-term outcome in ICU patients with acute kidney injury treated with renal replacement therapy: a prospective cohort study So the first three months are the main window to see whether the kidneys come back.
Sudden failure follows a crisis and can reverse, while chronic failure builds over years and rarely does. Temporary dialysis buys time for the kidneys to heal, and doctors check urine output and blood tests to judge recovery. Ask for kidney follow-up after discharge.
The outlook is shaped by what caused the failure, such as severe infection, low blood pressure, surgery or a medicine, and by how sick the rest of the body is. When the cause can be treated and the person improves overall, the kidneys have a much better chance of recovering.
Doctors often start temporary dialysis without knowing whether the kidneys will recover, so families should expect uncertainty for days or weeks. It is reasonable to ask the ICU team how the person is doing overall, not just the kidneys, since survival depends heavily on the whole illness. If the person isn’t improving, families can ask for a time-limited trial of dialysis with a planned review rather than an open-ended commitment.
What Actually Causes Death When Kidneys Fail
Failing kidneys can’t remove potassium, and high potassium raises the risk of dangerous heart rhythms and sudden death.27PubMed. Hyperkalemia in chronic kidney disease As potassium climbs, the heart’s electrical signals slow and become blocked.28PubMed Central. Hyperkalemia: pathophysiology, risk factors and consequences Above about 7 mmol/L on a blood test, the heart can stop or beat chaotically.29PubMed Central. Hyperkalemia in heart failure: Foe or friend?
High potassium often causes no symptoms until it is severe, which is why it can be sudden and why blood tests matter. It can climb quickly after missed dialysis, a high-potassium meal, or certain medicines.
Fluid that isn’t removed can back up into the lungs and cause breathing failure.30PubMed. Pulmonary complications after acute kidney injury When the kidneys stop making urine, water collects first in the legs and then around the lungs. Breathlessness often comes first when lying down, because fluid shifts toward the chest, and people may need to sleep propped up. Salty food and drinking more than the allowed amount speed the buildup.
Waste that builds up can harm brain cells and affect thinking.31PubMed Central. Protein-bound uremic toxins are associated with cognitive function among patients undergoing maintenance hemodialysis Over time, hardening of blood vessels from kidney disease signals a poorer outlook.32PubMed Central. Cardiovascular Disease in Chronic Kidney Disease
Some signs call for urgent medical care: sudden muscle weakness or palpitations can mean high potassium, shortness of breath when lying flat can mean fluid in the lungs, and new confusion or drowsiness can signal waste buildup.
Why Dialysis May Not Help Older or Frail People
Dialysis mainly helps younger, healthier people live longer.33PubMed Central. Dialysis versus conservative kidney management in older adults: why one size does not fit all For people 80 or older, or with several serious illnesses, the survival benefit faded or disappeared.34PubMed Central. Value-based evaluation of dialysis versus conservative care in older patients with advanced chronic kidney disease: a cohort study In frail patients, survival with dialysis and without it was about the same.35PubMed Central. Survival of patients who opt for dialysis versus conservative care: a systematic review and meta-analysis
Dialysis can cost time as well as give it. Hemodialysis often means several hours at a center three days a week plus travel, which for a frail person can use up much of the energy and time they have left. Older and frail people are more likely to be admitted to hospital, which can erode independence. Some people on dialysis lose the ability to live independently, so extra months may come with more dependence.
The choice is also about what the time is like, so a person who values being at home may weigh it differently from one who wants every possible day. Dialysis can be tried for a set period, such as a few months, and stopped if it isn’t helping, which makes the decision less final than it feels. Family members can help by asking the person what matters most, rather than assuming more treatment is always better.
Useful questions for the kidney doctor: how much extra time dialysis is likely to give this person, how often they would need treatments and hospital visits, what daily life would look like on each path, and whether palliative care can be involved either way.
Comfort and Symptoms Near the End
People dying of kidney failure have symptoms similar to people dying of cancer: pain, breathlessness, restlessness, nausea and chest secretions.36PubMed. Symptom management for the adult patient dying with advanced chronic kidney disease: a review of the literature and development of evidence-based guidelines by a United Kingdom Expert Consensus Group These are often missed or poorly treated, partly because many medicines build up in failing kidneys.37PubMed. Palliative care for patients with advance chronic kidney disease Palliative care teams can improve the end of life for people stopping dialysis or choosing not to start.38PubMed Central. Palliative and end-of-life care in advanced renal failure
Itching, common and distressing, can be eased with moisturizers and certain medicines, and nausea and restlessness can be treated with carefully chosen drugs. Because failing kidneys clear many medicines poorly, doctors usually pick drugs and doses that are safer in kidney failure, such as certain opioids for pain. Breathlessness from fluid can be eased by water pills while they still work, and by medicines and positioning when they no longer do.
Ask for a palliative care referral early, not only in the last days, and make sure doctors adjust drug doses for kidney failure. Discuss where the person wants to die, at home or in hospice, and expect the kidney and palliative teams to work together.
Kidney Failure in Children
About 8 in 10 children needing dialysis or a transplant are alive 10 years later, and two thirds after 20 years.39PubMed. Long-term survival of children with end-stage renal disease Children on dialysis faced more than four times the death risk of those with a transplant.40PubMed. Long-term survival of children with end-stage renal disease Babies under 1 year old faced the highest risk.41PubMed. Long-term survival of children with end-stage renal disease Deaths have fallen sharply since 1980, though they remain far above other children.42PubMed Central. Life Years Lost in Children with Kidney Failure: A Binational Cohort Study with Multistate Probabilities of Death and Life Expectancy Dialysis in children is often a bridge, used while they wait for a suitable kidney or grow big enough for surgery.
Kidney failure can slow growth and affect bone health, so children’s teams monitor height, nutrition and development. Children’s centers also support schooling and emotional wellbeing, which affects how well a child copes with treatment.
Parents can seek care at a children’s kidney center and ask early about transplant. Outcomes depend partly on access to good care where you live.